{"title":"Focal Reducers","description":"\u003c!----- Do not remove these tags as they are identifiers for the site's CSS -----\u003e\n\u003cp\u003eFocal reducers shorten the focal length and speed up the focal ratio of a telescope. Check out OPT's fine selection of focal reducers below!\u003c\/p\u003e\n\u003c!----- SUB DESCRIPTION -----\u003e \u003c!-- sub description --\u003e\n\u003cp\u003eReducers are similar to barlows, only their magnification factor is less than 1x. Focal reducers are great for astrophotography and visual use. If you are looking for brighter and wider views or want to shorten your exposure time a reducer is the best way to go!\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"#blog_block\"\u003e\u003cspan\u003eLearn More\u003c\/span\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [{\n    \"@type\": \"Question\",\n    \"name\": \"What do focal reducers do?\",\n    \"acceptedAnswer\": {\n      \"@type\": \"Answer\",\n      \"text\": \"A focal reducer is a device that reduces the size of an object viewed. It can be attached to the front of a telescope or lens. Focal reducers typically get used in astronomical observation, allowing users to reduce magnification and increase seeing time. Comparable to the “Barlow lens,” these devices are predominately used for observing planets, stars, and deep sky objects. They might also be called field reducers or field flatteners.\"\n    }\n  },{\n    \"@type\": \"Question\",\n    \"name\": \"How does a focal reducer work?\",\n    \"acceptedAnswer\": {\n      \"@type\": \"Answer\",\n      \"text\": \"Focal reducers are used in telescopes to reduce the focal length without reducing the magnification. They work by dividing the optical path into multiple segments. In a typical refractive telescope, the lens focuses light between the front and back lenses to form an erect image on the rear objective. The telescope focal reducer is inserted between these two lenses and has a much shorter focal length. This shorter focal length allows more light to pass through it, resulting in lower magnification at this point than would otherwise be possible with only one lens used since it requires less magnification power to focus.\"\n    }\n  },{\n    \"@type\": \"Question\",\n    \"name\": \"Does a focal reducer reduce magnification?\",\n    \"acceptedAnswer\": {\n      \"@type\": \"Answer\",\n      \"text\": \"Yes, telescopes use focal reducers to reduce magnification. A focal reducer is an alternative type of telescope lens. A telescope lens is designed to magnify. A focal reducer is an optical device that reverses the direction of light propagation. This means that an image viewed through a focal reducer is inverted, enlarged, and reduced in brightness, thereby reducing magnification.\"\n    }\n  },{\n    \"@type\": \"Question\",\n    \"name\": \"How is a focal reducer calculated?\",\n    \"acceptedAnswer\": {\n      \"@type\": \"Answer\",\n      \"text\": \"A focal reducer is a lens that reduces the focal length of the telescope. The focal reducer’s main purpose is to allow shorter focal lengths while maintaining high image quality. The focal reducer is calculated by dividing the new focal length of the telescope by the old focal length of the telescope.\"\n    }\n  }]\n}\n\u003c\/script\u003e","products":[{"product_id":"celestron-f-6-3-reducer-corrector","title":"Celestron f\/6.3 Reducer Corrector","description":"\u003cp style=\"text-align: left;\"\u003e\u003cspan style=\"font-size: 15px;\"\u003e\u003cstrong\u003eThe Celestron f\/6.3 Reducer\/Corrector\u003c\/strong\u003e lens accessory works with all Celestron C5, C8, C9.25, C11, and C14 SCT telescopes. This accessory makes it possible to have a dual focal ratio instrument, without sacrificing image quality. The Celestron reducer\/corrector is f\/6.3 for C5, C8, C9.25, and C11 telescopes, and f\/7 for the C14 telescope. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan style=\"font-size: 15px;\"\u003eThe Celestron f\/6.3 focal reducer is not compatible with either the Celestron HD and the Meade ACF scopes and OTA. The Celestron reducer\/corrector offers wide fields of view with any Schmidt-Cassegrain telescope. Used for astrophotography, it reduces exposure time by a factor of 3. The Celestron focal reducer uses fully multi-coated optics for the best image quality and light transmission. \u003c\/span\u003e\u003c\/p\u003e\n\u003c!-- split --\u003e\n\u003cul\u003e\n\u003cli\u003eReducer shortens the focal length of an SCT optical system by 37%.\u003c\/li\u003e\n\u003cli\u003eConverts f\/10 optical systems to f\/6.3 for a significantly wider field of view.\u003c\/li\u003e\n\u003cli\u003eFour-element, fully multi-coated optical design with 41mm clear aperture.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":44858327626,"sku":"CE-94175","price":189.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1594\/4815\/products\/cel-94175.jpg?v=1633457005"},{"product_id":"optec-nextgen-maxfield-0-33x-telecompressor-lens","title":"Optec NextGEN MAXfield 0.33X Telecompressor Lens","description":"\u003cp style=\"text-align: left;\"\u003e\u003cspan style=\"color: #000000;\"\u003e\u003cstrong\u003eThe NextGEN MAXfield 0.33X Reducer\/ Telecompressor Lens by Optec:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e \u003c\/p\u003e\n\u003cspan style=\"color: #000000;\"\u003e\u003cstrong\u003eThe Optec NGM (Next Generation MaxField) telecompressor\u003c\/strong\u003e\u003c\/span\u003e increases the effective speed of the Meade and Celestron Schmidt-Cassegrain telescopes from f\/10 to f\/3.3. This 3 fold reduction in focal length allows for 9 times greater field area and 1\/9 reduction in exposure time for extended surface objects such as bright nebulae. The system is optimized specifically for f\/10 Schmidt-Cassegrain telescopes to allow for the correction of field curvature and spherical chromatism that afflicts these types of instruments. At f\/3.3, the maximum corrected field has a diameter of 9 mm at the image plane which makes the unit suitable for CCD cameras with imaging chips of the same diagonal dimension or smaller. \u003cbr\u003e\u003cbr\u003e\n\u003cp\u003eThe optical design of the Optec NextGEN 0.33X was done with Zemax and optimized for four field points using wavelengths of 450, 550 and 650 nm. The goal was for the smallest blur diameters for the four field points. The system was modeled using the actual optical prescription for an SCT with the inherit aberrations of this telescope. The resulting lens curvatures of this design was made without adjusting the radii to the optical lab's tool list. Custom tools were made for all surfaces.\u003c\/p\u003e\n\u003cp\u003e\u003ci\u003eNote: You will need to order a \u003cstrong\u003eNEXGEN CCD Mounting Plate\u003c\/strong\u003e in order to attach this telecompressor to your CCD camera. \u003c\/i\u003e\u003ci\u003eEnter \"NEXGEN CCD MOUNTING PLATE\" into the search box an the plates will be listed with SKUs begging with  \"OP-17392...Scroll to find a listing with your specific camera.\u003c\/i\u003e\u003c\/p\u003e\n\u003cp\u003e-\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003ePhoto shows the SCT mount and CCD Camera Mount, both of which are sold separately.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003eOPT Product Number: \u003cb\u003eOP-17403\u003c\/b\u003e\u003c\/p\u003e","brand":"Optec","offers":[{"title":"Default Title","offer_id":44860439114,"sku":"OP-17403","price":350.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1594\/4815\/products\/e03669aceae46eef9c6fb9c8637aa8eb.jpg?v=1500388775"},{"product_id":"tele-vue-0-8x-reducer-400mm-600mm-telescopes","title":"Tele Vue 0.8X Reducer - 400mm - 600mm Telescopes","description":"\u003cp\u003e\u003cspan style=\"color: #000000;\"\u003e\u003cstrong\u003eThe TE-TRF-2008 0.8X 2-Inch Reducer\/Flattener for  - 400 mm to 600 mm Telescopes by Tele Vue:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eThis reducer converts TV-85 to 480 mm f\/5.6 and Pronto to 380 mm f\/5.4 for flat field, fast photography. Fully multi-coated 3-element unit inserts directly into 2-inch focuser, accepts standard T-rings for 35 mm cameras. Also it can be used with any 400 to 600 mm refractor. \u003cbr\u003e\u003cbr\u003e \u003cb\u003eImportant Note\u003c\/b\u003e: The Tele Vue 0.8X Reducer\/Flattener for 400 mm to 600 mm Telescopes was designed for an optimum 55 mm back focus. (Distance from flange surface to film or CCD plane). If you use a CCD, be sure the spacing between flange and CCD is 56 mm +\/-2 mm for best results. \u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cstrong\u003eTele Vue 0.8X Reducer\/Flattener for 400 mm to 600 mm Telescopes Review: \u003c\/strong\u003e\u003ci\u003e\"This accessory is a must-have for someone planning to use the TV-85 photographically\"\u003c\/i\u003e - review in Sky \u0026amp; Telescope, July 1999.\u003c\/p\u003e\n\u003cp\u003eOPT Product Number: \u003cb\u003eTE-TRF-2008\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cem\u003e\u003cspan style=\"color: #000000;\"\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e\u003c\/span\u003e All Tele Vue products are available to ship world-wide from OPT, and effective July 1, 2008, are covered by a Five Year Worldwide Limited Product Warranty! Always be sure to save your original packaging materials should you need to return any Tele Vue product for warranty or repair.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Tele Vue","offers":[{"title":"Default Title","offer_id":44861101258,"sku":"TE-TRF-2008","price":353.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1594\/4815\/products\/2c9a18aa3d7c77e6e2ae482abec362e3.jpg?v=1553301902"},{"product_id":"tpo-1-25-focal-reducer-0-5x-with-25mm-extension","title":"TPO 1.25\" Focal Reducer - 0.5X with 25mm Extension","description":"\u003cspan style=\"color: #000000;\"\u003e\u003cstrong\u003eThe Third Planet Optics 0.5x focal reducer\u003c\/strong\u003e\u003c\/span\u003e screws on to any 1.25-inch eyepieces barrel and provides a nominal reduction of 0.5X. This package comes with a 25 mm extension tube for further reduction. The actual focal length reduction will vary a little depending on where the focal reducer is placed in the optical path. The reducer features a 2-element fully multi-coated optical design and blackened lens edges in a black anodized aluminum filter cell. It also has additional 1.25-inch filter threads, so you can screw\/stack additional filters on to this reducer. Will work with all Meade DSI cameras, the Meade LPI, the Celestron NexImage, the Orion StarShoot cameras and most CCD cameras that use a 1.25-inch nosepiece!\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eOPT Product Number: \u003cspan style=\"color: #000000;\"\u003e\u003cstrong\u003eOS-FR\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c!-- split --\u003e\n\u003cul\u003e\n\u003cli\u003eBlackened Lens Edges\u003c\/li\u003e\n\u003cli\u003e2 Element Fully Multi-Coated Optics\u003c\/li\u003e\n\u003cli\u003eStackable Threaded Design\u003c\/li\u003e\n\u003cli\u003eNominal Reduction of 0.5X\u003c\/li\u003e\n\u003cli\u003eSize: 1.25-inch\u003c\/li\u003e\n\u003cli\u003eIncludes a 25 mm Extension Tube!\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"TPO","offers":[{"title":"Default Title","offer_id":12282574897216,"sku":"OS-FR","price":24.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1594\/4815\/products\/77a3021f97966e29111faab9ee27a1dd.jpg?v=1553305911"},{"product_id":"tele-vue-0-8x-reducer-tv102","title":"Tele Vue 0.8X Reducer - TV102","description":"\u003cp\u003eThis TeleVue .8X focal reducer and field flattener is made specifically for the TV102 and new TV102iis telescopes and can be used for imaging for up to 43mm diagonal formats.\u003c\/p\u003e\n\u003cp\u003eIt threads directly to the TV102iis 2.4\" focuser, and can be attached to the TV102's 2\" focuser with an optional \u003ca href=\"http:\/\/www.optcorp.com\/product.aspx?pid=8357\" target=\"blank\"\u003eTelevue RAD-1074 adapter\u003c\/a\u003e (see accessories tab for more info). This accessory requires the appropriate Tele Vue adapter to connect your camera (choices can be found in the \"Accessories\" tab, above).\u003c\/p\u003e","brand":"Tele Vue","offers":[{"title":"Default Title","offer_id":44869622666,"sku":"TE-RFL-4087","price":390.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1594\/4815\/products\/ef65222da00c263c348ad728c6a60be1.jpg?v=1553316319"},{"product_id":"antares-f-6-3-sct-focal-reducer","title":"Antares F\/6.3 SCT Focal Reducer","description":"\n\u003ch3\u003eAntares f\/6.3 SCT Focal Reducer\u003c\/h3\u003e\n\nFocal reducers are very versatile accessories. More powerful focal reducers are limited to photographic use, but the f\/6.3 reducer works well visually or photographically. When used visually, they extend the field of view. Eyepieces used with a focal reducer yield lower-power views. Photographically, a focal reducer shortens your exposure time by allowing more light to reach the film or sensor. \n\u003cp\u003eThis focal reducer is made to attach to the rear cell of Schmidt-Cassegrain or Maksutov-Cassegrain telescopes. Optically, it consists of a four-element lens that is fully multi-coated for high contrast and resolution.\u003c\/p\u003e\n\u003cp\u003eOPT Product Number: \u003cb\u003eAE-SCTFR\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Antares","offers":[{"title":"Default Title","offer_id":44870192906,"sku":"AE-SCTFR","price":90.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1594\/4815\/products\/Anatares-6.3f3-SCT-reducer-1.jpg?v=1511894788"},{"product_id":"baader-2inch-to-1-25inch-reducer-with-t-2-thread-t2-15","title":"Baader 2\" to 1.25\" Reducer with T-2 Thread","description":"\u003ch3\u003eBaader 2\" to 1.25\" Reducer with T-2 Thread\u003c\/h3\u003e\r\n\r\nThe Baader T2-15 Adapter is a 2\"-to-1.25\" reducer that permits you to convert your 2\" focuser for use with 1-1\/4\" eyepieces and accessories. A captive spring bronze lock ring guarantees protection of your eyepiece barrels from damage. The T2-15 reducer also incorporates two large nickel-plated brass knurled clamp screws that are oriented 90??? apart. The inclusion of two clamp screws results in a superior 3-point attachment that completely constrains your equipment from wobble, particularly important for imaging applications (typical single clamp screw adapters still allow some motion). Also, for those users that are physically unable to firmly grasp and tighten lock screws, the addition of a second screw doubles the locking force (ie, particularly nice for those unable to grip tightly due to arthritis).\r\n\r\n\r\n\r\nThe input side of the Baader 2\" to 1.25\" Reducer includes 48mm filter threads, and also includes a nested internal T-2 thread which enables you to use the reducer along with other T-2 system components.\r\n\r\nOne more unique feature sets our reducer apart - it includes an external T-2 thread that surrounds the eyepiece opening (covered and dressed by a knurled removable ring). This thread permits you to couple other T-2 accessories to the output side. In one application, you can attach T-2 Extension Tubes and create an extremely rigid afocal or eyepiece projection system. Once again, you are free to creatively construct your own combinations.\r\n\r\nBaader Planetarium Product Number:  \u003cb\u003eT2-15\u003c\/b\u003e","brand":"Baader","offers":[{"title":"Default Title","offer_id":44872714058,"sku":"BA-T2-15","price":52.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1594\/4815\/products\/d945c8094544363b8fe106e6db93ed05.jpg?v=1561060328"},{"product_id":"tpo-2inch-focal-reducer-fr2","title":"TPO 2\" Focal Reducer - 0.5X","description":"\u003cp\u003eThe TPO 2\" f\/5 Focal Reducer will help to lower the focal ratio of your optics. The outside thread connection of M48 x 0.75 will fit most 2\" eyepieces for visual use, too! Now you can connect your CCD camera and any 2\" threaded camera adapter, just by using the TPO 2\" Focal Reducer. Guess what? It even allows the connection of most 2\" filters, too!\u003c\/p\u003e\n\u003cp\u003eThe actual reduction will vary a little over or under 0.5x depending on exactly where the focal reducer is placed in the optical path. The exact focal length specification of this reducer has not been provided by the manufacturer, but we estimate it to be approximately 101-103mm. Hence, the \"working distance\" of this specific reducer is estimated to be 51mm, i.e., this reducer will provide a reduction of 0.5x when the center of its lens assembly is placed 51mm from the focal plane of the eyepiece or imaging device. Move the focal reducer closer to the eyepiece\/camera and its reduction factor will increase. Move it away and the reduction provided will decrease.\u003c\/p\u003e\n\u003cp\u003eBy using additional spacers or extension tubes (sold separately), you can vary the amount of reduction you obtain with this reducer as follows:\u003c\/p\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eExtra Spacer Length\u003c\/th\u003e\n\u003cth\u003eNominal Reduction Provided\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ccenter\u003e0\" \/ 0mm\u003c\/center\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003ccenter\u003e0.50x\u003c\/center\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ccenter\u003e0.25\" \/ 6.4mm\u003c\/center\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003ccenter\u003e0.44x\u003c\/center\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ccenter\u003e0.5\" \/ 12.7mm\u003c\/center\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003ccenter\u003e0.38x\u003c\/center\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ccenter\u003e0.75\" \/ 19.1mm\u003c\/center\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003ccenter\u003e0.31x\u003c\/center\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ccenter\u003e1\" \/ 25.4mm\u003c\/center\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003ccenter\u003e0.25x\u003c\/center\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cbr\u003e\n\u003cp\u003eTPO Product Number: \u003cspan style=\"color: #000000;\"\u003e\u003cstrong\u003eFR2\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c!-- split --\u003e\n\u003cul\u003e\n\u003cli\u003eConnects to 2\" nosepieces for CCD cameras and 2\" threads on 2\" camera adapters\u003c\/li\u003e\n\u003cli\u003eFits most 2\" eyepieces for visual use\u003c\/li\u003e\n\u003cli\u003eA 2\" thread inside to connect with most 2\" filters\u003c\/li\u003e\n\u003cli\u003eOutside thread is M48 x 0.75.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- split --\u003e\n\u003cul\u003e\n  \u003cli\u003eTPO 2\" Focal Reducer - 0.5X\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"TPO","offers":[{"title":"Default Title","offer_id":12285967564864,"sku":"OS-FR2","price":53.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1594\/4815\/products\/TPO-2inch-focal-reducer_f2b9c9cf-e8b5-471d-bae0-8d5954b0d3de.jpg?v=1553312555"},{"product_id":"planewave-66x-reducer-for-the-12-5-14-and-17-cdks","title":"PlaneWave .66x Reducer for the CDK12.5, CDK14, and CDK17","description":"\u003cp\u003eThis is a reducer designed specifically for flat field telescopes like the CDK. This reduces the f ratio of the CDK telescope 66%. The f\/6.8 telescopes will be reduced to about f\/4.5 and the f\/8 telescope down to f\/5.3.\u003c\/p\u003e\n\u003cp\u003eThere are two different models, one for the CDK12.5, CDK14, and CDK17; and one for the CDK20 and CDK24. Though these are optically identical, they are mechanically different. See chart in the image gallery for specific performance applications.\u003c\/p\u003e","brand":"Planewave","offers":[{"title":"Default Title","offer_id":44881673482,"sku":"PI-125166","price":1400.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1594\/4815\/products\/78bc21c6985fcbf537b43fbd3e5d0eee.jpg?v=1500425431"},{"product_id":"planewave-66x-reducer-for-cdk20-and-cdk24","title":"PlaneWave .66x Reducer for CDK20 and CDK24","description":"\n\u003ch3\u003ePlaneWave Instruments - .66x Reducer for CDK20 and CDK24\u003c\/h3\u003e\nThis is a reducer designed specifically for flat field telescopes like the CDK. This reduces the f ratio of the CDK telescope 66%. The f\/6.8 telescopes will be reduced to about f\/4.5 and the f\/8 telescope down to f\/5.3.  There are two different models, one for the CDK12.5, CDK14, and CDK17; and one for the CDK20 and CDK24. Though these are optically identical, they are mechanically different.  PlaneWave Instruments Product Number: \u003cb\u003e200166\u003c\/b\u003e","brand":"Planewave","offers":[{"title":"Default Title","offer_id":44881674058,"sku":"PI-200166","price":1400.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1594\/4815\/products\/0f93f182f574dca061c72d59f40339d5.jpg?v=1500425458"},{"product_id":"takahashi-reducer-cr-0-73x","title":"Takahashi Reducer CR 0.73x","description":"\u003cp\u003eThe Takahashi ReducerCR changes the Mewlon-250CRS to an f\/7.3 wider field imager yet with the larger image scale for larger objects.\u003c\/p\u003e\n\u003cp\u003eThe reducer can also be use on the CCA-250, Mewlon 300CRS, and FSQ-106EDX4\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eReducer CR 0.73x\u003c\/li\u003e\n\u003cli\u003eEffective focal ratio f\/7.2\u003c\/li\u003e\n\u003cli\u003eEffective focal length 2160mm\u003c\/li\u003e\n\u003cli\u003eImage circle 35mm diameter\u003c\/li\u003e\n\u003c\/ul\u003e\nTakahashi Product Number: \u003cb\u003eMCR0073\u003c\/b\u003e","brand":"Takahashi","offers":[{"title":"Default Title","offer_id":44883851402,"sku":"TK-TKA82580","price":850.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1594\/4815\/products\/Takahshi-Reducer-CR0.73x.jpg?v=1521068463"},{"product_id":"op-19407-lepus-0-62x-reducer","title":"Optec Lepus 0.62x Reducer","description":"\u003cp\u003eOptec brings you a reducer for your corrected SCT. Compatible with the Meade ACF, this accessory will allow you to shorten the exposure time of your astroimages.\u003c\/p\u003e\n\u003cp\u003eBuilt with a huge 100mm of back focus, Optec has left plenty of room to accommodate any CCD and filter wheel combo or DSLR with room to spare! If you want to purchase a reducer for a Celestron EdgeHD scope, please purchase the specific reducer for your size EdgeHD telescope.\u003c\/p\u003e\n\u003c!-- split --\u003e\n\u003cul\u003e\n\u003cli\u003eDesigned for Midsize CCD's and DSLRs\u003c\/li\u003e\n\u003cli\u003eDelivers a 22mm diameter image without vignetting and can also provide well-corrected images up to 28mm with only minor light fall-off.\u003c\/li\u003e\n\u003cli\u003eFlat fielding is recommended for the best results.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- split --\u003e\n\u003cul\u003e\n\u003cli\u003eOptec Lepus 0.62x Reducer\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Optec","offers":[{"title":"Default Title","offer_id":44887801546,"sku":"OP-19407","price":225.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1594\/4815\/products\/Optec-Lepus-0.62x-Reducer.jpg?v=1634071506"},{"product_id":"tk-trdc0106-trdc0106-reducer-coupling-for-fsq-106ed-camera-angle-a","title":"Takahashi Reducer Coupling for FSQ-106ED Camera Angle A","description":"\u003cp\u003eThe Takahashi TRDC0106 Reducer Coupling was designed specifically for the FSQ-106ED Camera Angle A. Item #17 on Takahashi FSQ-106 ED Photo-Visual Systems Chart.\u003c\/p\u003e\n\u003cp\u003eThe TRDC0106 Takahashi Reducer Coupling is made to sit inside the Camera Angle Adjuster (CAA) on the FSQ-106ED telescope on one end, and the 0.73X Reducer on the other. This negative length 92mm - 72mm adapter puts the reducer inside the CAA so that it can reach infinity focus using the standard TCA1020 and TCDXXXX adapter for your specific CCD camera.\u003c\/p\u003e","brand":"Takahashi","offers":[{"title":"Default Title","offer_id":44889911178,"sku":"TK-TKA36002","price":79.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1594\/4815\/products\/165f449064941155e8b42d15f89b674b.jpg?v=1553305487"},{"product_id":"sw-s20201-reducer-corrector-for-pro-100-ed","title":"Sky-Watcher Reducer \/ Corrector for EvoStar 100 ED","description":"\u003cp\u003eThis 0.85x Focal Reducer\/Corrector for Sky-Watcher EvoStar 100 ED APO is designed for serious Astro-Imagers. Optimized for the Sky-Watcher EvoStar 100 ED (also known as the Pro ED 100) APO, this superb quality accessory effectively reduces the telescope's focal length by a factor of 0.85x and provides much improved field-edge correction.\u003c\/p\u003e\n\u003c!-- split --\u003e\n\u003cul\u003e\n\u003cli\u003e0.85 Focal Reduction Rate\u003c\/li\u003e\n\u003cli\u003eProvides superb field-edge correction\u003c\/li\u003e\n\u003cli\u003eOptimized for use with Sky-Watcher EvoStar 100 ED Apochromat\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- split --\u003e\n\u003cul\u003e\n\u003cli\u003eSky-Watcher Reducer \/ Corrector for EvoStar 100 ED\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Sky-Watcher","offers":[{"title":"Default Title","offer_id":44893353418,"sku":"SW-S20201","price":380.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1594\/4815\/products\/6cc03ca5c26fdbdf9f250d4058e504c6.jpg?v=1500438541"},{"product_id":"sw-s20202-reducer-corrector-for-pro-120-ed","title":"Sky-Watcher Reducer \u0026 Corrector for EvoStar 120 ED","description":"\u003cp\u003e0.85x Focal Reducer\/Corrector for Sky-Watcher EvoStar 120 ED APO is designed for serious Astro-Imagers. Optimized for the Sky-Watcher EvoStar 120 ED (also known as the Pro ED 120) APO, this superb quality accessory effectively reduces the telescope's focal length by a factor of 0.85x and provides much improved field-edge correction.\u003c\/p\u003e\n\u003c!-- split --\u003e\n\u003cul\u003e\n\u003cli\u003eFocal Length Reduction: 0.85x\u003c\/li\u003e\n\u003cli\u003eCorrects the edge of field\u003c\/li\u003e\n\u003cli\u003eOptimized for the Sky-Watcher EvoStar 120 ED APO\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- split --\u003e\n\u003cul\u003e\n\u003cli\u003eSky-Watcher Reducer \/ Corrector for EvoStar 120 ED\u003c\/li\u003e\n\u003cli\u003eTwo Year Limited Warranty\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Sky-Watcher","offers":[{"title":"Default Title","offer_id":44893360970,"sku":"SW-S20202","price":395.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1594\/4815\/products\/ca7468466ad930a8d547b9b74f8bcb50.jpg?v=1500438553"},{"product_id":"or-8894-0-8x-focal-reducer-for-refractor-telescopes","title":"Orion 0.8x Focal Reducer for Refractor Telescopes","description":"\u003cp\u003e\u003cstrong\u003eThe 0.8x Focal Reducer for Refractor Telescopes by Orion:\u003c\/strong\u003e Some of the most picturesque celestial objects are too large to fit in the field of view of an imaging refractor and camera. What's more, most objects in deep space are very faint and therefore challenging to image without taking very long exposures, increasing the potential for error. Our new Orion 0.8x Focal Reducer for Refractors addresses these obstacles by increasing your refractor telescope's field of view while reducing the effective focal length by a factor of 0.8x, thereby providing a shorter, more optically\u003cem\u003e fast\u003c\/em\u003e focal ratio to increase astrophotography efficiency. Using the 0.8x focal reducer not only enables your refractor telescope to acquire a larger field of view, but also makes it capable of capturing bright, vividly detailed astrophotos in considerably less time. The Orion 0.8x Imaging Focal Reducer's fully multi-coated, 38 mm clear aperture optics are housed in a sleek, all-machined, anodized aluminum body. Internal glare-threads provide maximum image contrast and brightness. It is designed for use with any refractor telescope equipped with a 2-inch focuser, and requires 55 mm of backfocus. Use with a DSLR and appropriate T-ring combination will not require use of any spacers. For use with a CCD astrophotography camera with less backfocus, we highly recommend using the Orion T-thread Spacer Ring Kit (sold separately) to achieve proper distance. You can further enhance your astrophotos by using 2-inch imaging filters with the Orion 0.8x Imaging Focal Reducer since it is conveniently threaded for use with 2-inch filters. Unit weighs 6.2 oz.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #000000;\"\u003e\u003cstrong\u003eOrion 0.8x Focal Reducer for Refractor Telescopes Features:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eReduces an astrophotography refractor's effective focal length by a factor of 0.8x, providing a shorter, more optically fast focal ratio\u003c\/li\u003e\n\u003cli\u003eDesigned for use with any refractor telescope equipped with a 2-inch focuser\u003c\/li\u003e\n\u003cli\u003eEnables a refractor to both acquire a larger field of view and to capture bright, detailed astrophotos in considerable less time\u003c\/li\u003e\n\u003cli\u003eFeatures fully multi-coated, 38 mm clear aperture optics housed in a sleek, machined and anodized aluminum body\u003c\/li\u003e\n\u003cli\u003eRequires 55 mm of backfocus\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eOPT Product Number: \u003cb\u003eOR-08894\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Orion","offers":[{"title":"Default Title","offer_id":44894267658,"sku":"OR-08894","price":149.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1594\/4815\/products\/download-2021-04-29T113040.141.png?v=1619717469"},{"product_id":"optec-lepus-hd-telecompressor-c11-edgehd-edition","title":"Optec Lepus HD Telecompressor C11 EdgeHD Edition","description":"\u003cp\u003eOptec's Lepus HD Telecompressor for Celestron C11 EdgeHD Edition is a Lepus 0.62X Telecompressor Lens System.\u003c\/p\u003e\n\u003cp\u003eMounted in a 3.25-inch x 24tpi threaded holder for direct attachment to Celestron 1100 EdgeHD SCT. This three-piece lens mounting system includes a lens holder, spacer, and orange retaining ring. \u003cspan\u003eFor use with any Lepus or VLC camera mount having the Optec-2100 2.1-inch dovetail receiver.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eThe close coupled mount provides optimal image quality by maintaining a minimum distance between EdgeHD corrector optics and Lepus telecompressor lens grouping. The back-focus distance is reduced to 100 mm on-axis and maintained by a camera specific mount (order Lepus camera mount separately). Contact OPT for cameras not listed.\u003c\/p\u003e\n\u003cp\u003e[If you are looking for the camera mount, it is the Celestron 3.25-inch x 24tpi female thread mount \/\/ OP-2100 male dovetail] \u003c\/p\u003e\n\u003cp\u003e OPT Product Number: \u003cb\u003eOP-19411\u003c\/b\u003e\u003c\/p\u003e","brand":"Optec","offers":[{"title":"Default Title","offer_id":44894634634,"sku":"OP-19411","price":295.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1594\/4815\/products\/67968edad78d2d60f1124be0ce870481.jpg?v=1522275981"},{"product_id":"celestron-reducer-edgehd-1100","title":"Celestron .7x Reducer for EdgeHD 1100","description":"\u003cp\u003e\u003cspan style=\"color: #000000;\"\u003e\u003cstrong\u003eThe Celestron .7x Reducer Lens makes your EdgeHD 1100 one full f-stop faster than f\/10\u003c\/strong\u003e\u003c\/span\u003e, reducing your exposure time by one-half to capture the same object brightness. It maintains a similar flat-field performance as the native EdgeHD optical design while increasing the FOV by 43% to better capture wide-field images.\u003c\/p\u003e\n\u003cp\u003eThe EdgeHD reducer threads directly onto the 3.25-inch threads of your EdgeHD optical tube. This reduces mechanical vignetting and allows for use with larger (full frame) sensors and Off-Axis Guiders. It keeps the identical back focus when used at f\/10 and provides generous back focus to accommodate additional accessories and a wide variety of cameras.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eGAIN BETTER ASTRO-IMAGING AND VIEWING WITH THE CELESTRON EDGEHD 1100 .7X REDUCER\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuality Design:\u003c\/strong\u003e 5-element optical layout designed specifically for the EdgeHD 1100 to maintain the flat-field performance of the Edge HD optical design\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaintains the Same Back Focus as When Used at f\/10:\u003c\/strong\u003e Unlike generic reducers the EdgeHD .7x provides generous back focus to accommodate additional accessories and a wide variety of cameras. It also allows use of existing EdgeHD T-Adapters and other Celestron imaging accessories.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOne Full F-stop Faster Than f\/10:\u003c\/strong\u003e Reduces the exposure time by one-half to capture the same brightness of object.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncrease Field of View by 43%:\u003c\/strong\u003e Better for capturing wide-field images of larger galaxies and nebulae.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLanthanum Glass Elements:\u003c\/strong\u003e EdgeHD reducer uses \"rare earth\" Lanthanum glass elements for clear, high contrast viewing while minimizing chromatic aberration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFully Multi-coated Lens Elements:\u003c\/strong\u003e All air-to-glass surfaces have multiple layers of coating for maximum light transmission and color correction.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBlackened Edges:\u003c\/strong\u003e All lens elements have blackened edges to minimize internal reflection and maximize contrast.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull Frame Design: \u003c\/strong\u003eThreads directly onto the 3.25-inch threads of the EdgeHD optical tube. Reduces mechanical vignetting and allows for use with larger (full frame) sensors and Off-Axis Guiders.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClear Aperture:\u003c\/strong\u003e 60 mm clear aperture lens optimized for a 42 mm image circle for use with large CCD sensors.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMachined Aluminum Housing:\u003c\/strong\u003e Computer-assisted CNC machined aluminum housing for precise spacing and alignment of the optical elements.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThreaded metal covers for both ends:\u003c\/strong\u003e To protect your investment from unwanted dust and scratches.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimized Versatility:\u003c\/strong\u003e Fastar compatibility and f\/2 imaging with optional accessory. The EdgeHD is the most complete imaging system in its price range.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eOPT Product Number: \u003cstrong\u003eCE-94241\u003c\/strong\u003e\u003c\/p\u003e\n\u003c!-- split --\u003e\n\u003cul\u003e\n\u003cli\u003eCuts Your Imaging Time in Half!\u003c\/li\u003e\n\u003cli\u003eUse with Your EdgeHD 1100 Telescope.\u003c\/li\u003e\n\u003cli\u003eReduces Your Focal Ratio.\u003c\/li\u003e\n\u003cli\u003e43% Wider FOV.\u003c\/li\u003e\n\u003cli\u003eFits the EdgeHD 1100 Threads.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c!-- split --\u003e\n\u003cul\u003e\n\u003cli\u003eCelestron EdgeHD .7x Focal Reducer Lens.\u003c\/li\u003e\n\u003cli\u003eThreaded metal lens covers for both ends.\u003c\/li\u003e\n\u003cli\u003e2 Year Warranty.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":44895440586,"sku":"CE-94241","price":839.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1594\/4815\/products\/131b1c537e8daf881fb4b343f5339d2e.jpg?v=1570142693"},{"product_id":"astro-physics-ccd-focal-reducer-for-f-9-f-18","title":"Astro-Physics CCD Focal Reducer for f\/9-f\/18 Telescopes","description":"\u003cp\u003eThis AP telecompressor will provide full coverage of the ST10E chip with scopes ranging from f\/9 to f\/18 focal ratio. The 2-element cemented design transmits close to 99% of the incoming light over the range of 420 to 700 nm. The focal length of the telecompressor optics is 12 inch. For refractors, the field is compressed by 0.67x (when using a Color Filter Wheel). If you have a moving mirror system, the native focal ratio will increase.\u003c\/p\u003e\n\u003cp\u003eThe design allows full corner-to-corner illumination of the ST-10 and ST-8300 chips with most catadioptric telescopes. This design does not add coma to the wavefront, and thus can be used with all flat-field and coma-free telescopes such as Maksutov-Cassegrains, Schmidt-Cassegrains, Ritchey-Chretiens and refractors. The inherent resolution of the telescope is not compromised when using this compressor. Please review this \u003cspan style=\"color: #00aaff;\"\u003e\u003ca href=\"https:\/\/www.astro-physics.info\/tech_support\/accessories\/photo_acc\/telecompressor-techdata.pdf\" target=\"_blank\" title=\"Telecompression Chart\" style=\"color: #00aaff;\" rel=\"noopener noreferrer\"\u003eTelecompression Chart\u003c\/a\u003e\u003c\/span\u003e to see how this item will fit into your imaging system.\u003c\/p\u003e\n\u003cp\u003eIf you want a higher compression ratio, but do not use the color filter wheel, you can add one or more of the 2 inch Barrel Extension w\/ 48 mm Threads (A3703) between the CCDT67 and the nosepiece of your camera. This has the advantage of inserting the CCDT67 forward in the light cone so that in-travel (backspacing) requirements are reduced. An alternative is to use T-2 extension rings from Baader Planetarium, and thread the 15mm T-2 Extension Ring and 7.5 mm Extension Ring between the CCD camera and the nosepiece. This will approximate the spacing of a color filter wheel. You can also experiment with a single extension or other combinations. Please note that as you increase compression, you decrease the size of the image circle at the focus point.\u003c\/p\u003e\n\u003cp\u003eAt 0.67x, the CCDT67 will cover the chip of the ST-10 and ST-8300. It can never cover the chip of an STL series camera or the newer large size digital SLR chips, because its clear aperture is no larger than their CCD chips.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThe clear aperture of the AP CCD Telecompressor is 1.75 inch. It is designed to screw into the 2 inch Tapered Nosepiece (AP16T) or any other 2 inch nosepiece with 48 mm threads that is designed for CCD cameras. It will not thread all the way into the nosepiece provided with SBIG cameras since the threads of that nosepiece are not deep enough.\u003c\/li\u003e\n\u003cli\u003e0.67x Compression ratio for SBIG ST7\/8\/10 + Color Filter Wheel, when used with refractors. Fully illuminated circle: 29 mm0.75x Compression ratio for SBIG ST7\/8\/10 (without Color Filter Wheel or T-2 extensions), when used with refractors. Fully illuminated circle: 34 mm\u003c\/li\u003e\n\u003cli\u003eApproximately 5 inches of back focus is needed to achieve focus on the CCD chip. It will not work with the AO7.\u003c\/li\u003e\n\u003cli\u003eThe focal length of the CDD Telecompressor is 12 inch (305 mm).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- split --\u003e\n\u003cul\u003e\n\u003cli\u003eTelecompressor designed to screw into 2-inch Nosepieces\u003c\/li\u003e\n\u003cli\u003e0.67x Compression Ratio for SBIG ST7\/8\/10 w\/ Refractors and Filter Wheel\u003c\/li\u003e\n\u003cli\u003e0.75x Compression Ratio for SBIG ST7\/8\/10 w\/ Refractors\u003c\/li\u003e\n\u003cli\u003eRequires 5 inch Back Focus\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- split --\u003e\n\u003cul\u003e\n\u003cli\u003eAstro-Physics CCD Telecompressor for f\/9 - f\/18 Telescopes\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Astro-Physics","offers":[{"title":"Default Title","offer_id":44899668362,"sku":"AP-CCDT67","price":189.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1594\/4815\/products\/UT-12132.jpg?v=1596043514"},{"product_id":"takahashi-fc-76d-reducer-tka1858","title":"Takahashi 76D Reducer","description":"\u003ch2 style=\"text-align: center;\"\u003e\u003cstrong\u003eTakahashi FC-76D Reducer\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eThe Takahashi FC-76D Reducer is a dedicated reducer which is compatible with the FC-76, FC-76D and FS-78. The dedicated reducer changes the focal length to 417mm and the f-stop to f\/5.5. The image circle is 36mm.FC-76D + 76D Reducer:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFocal Length 417mm\u003c\/li\u003e\n\u003cli\u003eF\/ratio f\/5.5\u003c\/li\u003e\n\u003cli\u003eImage circle 36mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFC-76 + 76D Reducer:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFocal length 438mm\u003c\/li\u003e\n\u003cli\u003eF\/ratio f\/5.8\u003c\/li\u003e\n\u003cli\u003eImage circle 36mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFS-78 + 76D Reducer:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFocal length 462mm\u003c\/li\u003e\n\u003cli\u003eF\/ratio f\/5.9\u003c\/li\u003e\n\u003cli\u003eImage circle 36mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eTakahashi Product Number: \u003cb\u003eTKA1858 \u003c\/b\u003e\u003c\/p\u003e","brand":"Takahashi","offers":[{"title":"Default Title","offer_id":44900012874,"sku":"TK-TKA18580","price":620.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1594\/4815\/products\/2a2360c75cec04610de437fb4f3d5b3f.jpg?v=1553308559"},{"product_id":"celestron-reducer-edgehd-800","title":"Celestron .7X Focal Reducer for EdgeHD 800","description":"\u003cp\u003e\u003cstrong\u003eThe Celestron EdgeHD 800 .7X Focal Reducer\u003c\/strong\u003e features a custom 4-element optical design engineered to maintain the flat-field performance of the EdgeHD optics. Unlike generic reducers, this premium reducer provides substantial back focus (105 mm) to accommodate an assortment of imaging accessories.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eExperience high-contrast viewing with minimal chromatic aberration with the EdgeHD 800\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eOffering extra-low dispersion, its exotic Lanthanum elements provide mesmerizing views. All air-to-glass lens surfaces of the .7X Focal Reducer Lens feature multiple layers of coating for maximum light transmission and color correction. Enjoy blackened edges that minimize internal reflection and maximize image contrast!\u003c\/p\u003e\n\u003cp\u003eThe aluminum housing of the focal reducer has been designed and CNC machined for precise spacing and alignment of the optical elements. Store and transport your reducer safely with its featured threaded metal caps, included as well.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eGain better astro-imaging and viewing with the Celestron EdgeHD 800 Focal Reducer\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuality Design:\u003c\/strong\u003e 4-element optical layout designed specifically for the EdgeHD 8-inch to maintain the flat-field performance of the EdgeHD optical design.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e105 mm of Backfocus:\u003c\/strong\u003e Provides generous back focus to accommodate additional accessories and a wide variety of cameras. It also allows the use of existing T-adapters for EdgeHD 800 and other Celestron imaging accessories.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOne Full F-Stop Faster Than f\/10:\u003c\/strong\u003e Reduces the exposure time by one-half to capture the same brightness of an object.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncrease The Field of View by 43%:\u003c\/strong\u003e Better for capturing wide-field images of larger galaxies and nebulae.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLanthanum Glass Elements:\u003c\/strong\u003e EdgeHD reducer uses Rare Earth Lanthanum glass elements for clear, high contrast viewing while minimizing chromatic aberration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFully Multi-coated Lens Elements:\u003c\/strong\u003e All air-to-glass surfaces have multiple layers of coating for maximum light transmission and color correction.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBlackened Edges:\u003c\/strong\u003e All lens elements have blackened edges to minimize internal reflection and maximize contrast.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimized for APS-C sized sensors:\u003c\/strong\u003e Including most DSLR cameras and Nightscape CCD cameras\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMachined Aluminum Housing:\u003c\/strong\u003e Computer-assisted CNC machined aluminum housing for precise spacing and alignment of the optical elements.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThreaded Metal Covers for Both Ends of The Lens Assembly:\u003c\/strong\u003e To protect your investment from unwanted dust and scratches.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete Image System:\u003c\/strong\u003e Provides an intermediate focal length between the telescope (f\/10) and the optional Hyperstar accessory at f\/2, making the EdgeHD the most-complete imaging system in its price range.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e OPT Product Number: \u003cstrong\u003e\u003cspan style=\"color: #000000;\"\u003eCE-94242\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c!-- split --\u003e\n\u003cul\u003e\n\u003cli\u003eHigh-contrast Viewing!\u003c\/li\u003e\n\u003cli\u003e.7x Focal Reducer.\u003c\/li\u003e\n\u003cli\u003eDouble your Equivalent Exposure Time.\u003c\/li\u003e\n\u003cli\u003e4-Element Lens Design.\u003c\/li\u003e\n\u003cli\u003eProvides 105 mm Back Focus.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c!-- split --\u003e\n\u003cul\u003e\n\u003cli\u003eCelestron .7X Focal Reducer for EdgeHD 800.\u003c\/li\u003e\n\u003cli\u003e2 Year Warranty.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":44900691274,"sku":"CE-94242","price":409.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1594\/4815\/products\/UT-12052.jpg?v=1570142629"},{"product_id":"takahashi-toa130-reducer-camera-ring-tka31580n","title":"Takahashi TOA-35 0.7X Reducer \u0026 Camera Ring - TOA-130","description":"\u003cp\u003eThe ideal design for a reducer is its ability to reduce the f-stop while flattening the field and controlling chromatic aberration. The Takahashi TOA-35 0.07x reducer is configured with 4-elements in three groups and uses low dispersion, high refractive index glass for two of the elements, while reducing the focal length by a factor of 30%.\u003c\/p\u003e\n\u003cp\u003eThe Tak TOA-35 reducer produces 3-micron stars in the center of the field and 6-micron stars at the edge with a very flat field. There is also an improvement in the color correction. The 0.7X Reducer is supplied with a wide mount 55mm adapter to attach the reducer to the customer's camera.\u003c\/p\u003e\n\u003ch3 style=\"text-align: center;\"\u003eTakahashi TOA-35 0.7x Reducer Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eFocal Length (installed on TOA-130): 698mm\u003c\/li\u003e\n\u003cli\u003eFocal Ratio (installed on TOA-130): f\/5.4\u003c\/li\u003e\n\u003cli\u003eImage Circle: 44mm\u003c\/li\u003e\n\u003cli\u003eMetal Back Distance: 71.5mm\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Takahashi","offers":[{"title":"Default Title","offer_id":44903632394,"sku":"TK-TKA31580NS","price":1320.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1594\/4815\/products\/38a159d736c756b056910302ffea455f.jpg?v=1500458267"},{"product_id":"takahashi-toa150-reducer-camera-ring-tka32580n","title":"Takahashi TOA-35 0.7X Reducer \u0026 Camera Ring - TOA-150, TSA-102\/120","description":"\u003cspan style=\"color: #000000;\"\u003e\u003cstrong\u003eThe TOA-150 0.7X Reducer and Wide Camera Mount Set by Takahashi:\u003c\/strong\u003e\u003c\/span\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eThe ideal design for a reducer is its ability to reduce the f-stop while flattening the field and controlling chromatic aberration. The Takahashi TOA-35 0.07x reducer is configured with 4-elements in three groups and uses low dispersion, high refractive index glass for two of the elements, while reducing the focal length by a factor of 30-percent.\u003c\/p\u003e\n\u003cp\u003eThe Tak TOA-35 reducer produces 3 micron stars in the center of the field and 6 micron stars at the edge with a very flat field when used with the TOA-150. Images sizes for the TSA-102 and 120 are 8 microns at center and 12 microns at the edge. There is also an improvement in the color correction on all models. The 0.7X Reducer is supplied with a wide mount, 55 mm adapter to attach the reducer to the customer's camera.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #000000;\"\u003e\u003cstrong\u003eTakahashi TOA-35 0.7x Reducer Specifications:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFocal Length (installed on TOA-150): 775 mm\u003c\/li\u003e\n\u003cli\u003eFocal Length (installed on TSA-102): 575 mm\u003c\/li\u003e\n\u003cli\u003eFocal Length (installed on TSA-120): 635 mm\u003c\/li\u003e\n\u003cli\u003eFocal Ratio (installed on TOA-150): f\/5.2\u003c\/li\u003e\n\u003cli\u003eFocal Ratio (installed on TSA-102): f\/5.6\u003c\/li\u003e\n\u003cli\u003eFocal Ratio (installed on TSA-120): f\/5.3\u003c\/li\u003e\n\u003cli\u003eImage Circle (all models): 44 mm\u003c\/li\u003e\n\u003cli\u003eMetal Back Distance (all models): 68.5 mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cem\u003e\u003cspan style=\"color: #000000;\"\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e\u003c\/span\u003e Image shows both models of the TOA-35 Reducer (TOA-130 \u0026amp; TOA-150\/TSA). You will only receive one of them.\u003c\/em\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Takahashi","offers":[{"title":"Default Title","offer_id":44903639882,"sku":"TK-TKA32580NS","price":1320.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1594\/4815\/products\/76140f92bca8fbe7ce78c2bd9f50c0e5.jpg?v=1500458281"},{"product_id":"tpo-1-25inch-pt5-focal-reducer","title":"TPO 1.25\" Focal Reducer - 0.5X","description":"\u003cp\u003eThe TPO 0.5x focal reducer screws onto any 1.25\" eyepiece barrel and provides a nominal reduction of 0.5X. The actual focal length reduction will vary a little over or under 0.5x depending on where the focal reducer is placed exactly in the optical path. The TPO .5X reducer features a 2-element fully multi-coated optical design and blackened lens edges in a black anodized aluminum filter cell. It also has additional 1.25\" filter threads, so you can screw\/stack additional filters on to this reducer.\u003c\/p\u003e\n\u003cp\u003eThe actual reduction will vary a little over or under 0.5x depending on exactly where the focal reducer is placed in the optical path. The exact focal length specification of this reducer has not been provided by the manufacturer, but we estimate it to be approximately 101-103mm. Hence, the \"working distance\" of this specific reducer is estimated to be 51mm, i.e., this reducer will provide a reduction of 0.5x when the center of its lens assembly is placed 51mm from the focal plane of the eyepiece or imaging device. Move the focal reducer closer to the eyepiece\/camera and its reduction factor will increase. Move it away and the reduction provided will decrease.\u003c\/p\u003e\n\u003cp\u003eBy using additional spacers or extension tubes (sold separately), you can vary the amount of reduction you obtain with this reducer as follows:\u003c\/p\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eExtra Spacer Length\u003c\/th\u003e\n\u003cth\u003eNominal Reduction Provided\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ccenter\u003e0\" \/ 0mm\u003c\/center\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003ccenter\u003e0.50x\u003c\/center\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ccenter\u003e0.25\" \/ 6.4mm\u003c\/center\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003ccenter\u003e0.44x\u003c\/center\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ccenter\u003e0.5\" \/ 12.7mm\u003c\/center\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003ccenter\u003e0.38x\u003c\/center\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ccenter\u003e0.75\" \/ 19.1mm\u003c\/center\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003ccenter\u003e0.31x\u003c\/center\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ccenter\u003e1\" \/ 25.4mm\u003c\/center\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003ccenter\u003e0.25x\u003c\/center\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cbr\u003e\n\u003cp\u003eTPO Product Number: \u003cspan style=\"color: #000000;\"\u003e\u003cstrong\u003eFR-ONLY\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c!-- split --\u003e\n\u003cul\u003e\n\u003cli\u003eBlackened Lens Edges\u003c\/li\u003e\n\u003cli\u003e2 Element Fully Multi-Coated Optics\u003c\/li\u003e\n\u003cli\u003eStackable Threaded Design\u003c\/li\u003e\n\u003cli\u003eNominal Reduction of 0.5X\u003c\/li\u003e\n\u003cli\u003eSize: 1.25 inches\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- split --\u003e\n\u003cul\u003e\n\u003cli\u003eTPO 1.25\" Focal Reducer - 0.5X\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"TPO","offers":[{"title":"Default Title","offer_id":12284859187264,"sku":"OS-FR-ONLY","price":19.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1594\/4815\/products\/2f317ae7d83d58c2ccb8546feea94d54.jpg?v=1553305947"},{"product_id":"takahashi-fc35-focal-reducer","title":"Takahashi FC-35 0.66x Reducer","description":"\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eTakahashi FC-35 .66X Reducerfor FC-100DF, FS-102, and FC-100 Telescopes\u003c\/h3\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eThe FC-35 0.66 X Reducer was designed by Takahashi Japan for a wide variety of their FC and FS series telescopes.\u003c\/p\u003e\n\u003cp\u003eThis FC-35 is compatible with the FC-100DF, FC-100, and the FS-102 when used with the \u003ca href=\"https:\/\/optcorp.com\/products\/takahashi-fc-100-camera-ring-adapter-tka23202\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eCA 100 ring\u003c\/a\u003e (sold separably). A \u003ca target=\"_blank\" rel=\"noopener noreferrer\"\u003eFC-35 is also available with a CA 130 Ring\u003c\/a\u003e for use with FC-125, FC-128, and FC-152 telescopes. \u003c\/p\u003e\n\u003cp\u003eThe FC-35 will reduce the focal length of your telescope by 10%, and will provide a 44 mm diameter image circle. The metal back, as measured from the flat, rear-most shoulder of the FC-35, is 78.1 mm.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eWith the FC-35 installed, each compatible telescope will have the following focal length and f\/ratio:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFC-100DF: 485 mm, f\/4.9\u003c\/li\u003e\n\u003cli\u003eFC-100: 526 mm, f\/5.3\u003c\/li\u003e\n\u003cli\u003eFS-102: 542 mm, f\/5.3\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Takahashi","offers":[{"title":"Default Title","offer_id":44908135626,"sku":"TK-TKA19580","price":1110.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1594\/4815\/products\/5e780ec8f1faebecaae79c5116f356f5.jpg?v=1553300092"},{"product_id":"planewave-0-66x-reducer-for-cdk-telescopes-with-irf90-rotating-focuser-600166","title":"Planewave 0.66x Reducer for CDK Telescopes with IRF90 Rotating Focuser","description":"\u003ch3\u003ePlanewave 0.66x Reducer for CDK Telescopes with IRF90 Rotating Focuser\u003c\/h3\u003e\u003cp\u003e\r\n\r\nThe Planewave 0.66x Reducer was created to work with flat field telescopes such as the CDK. This particular model has been designed to be used with the IRF90 rotating focuser. The 600166 CDK Reducer has a lower profile and can be used with cameras that take up more back focus.  As with any high performance telescope, this reducer is easily affected by spacing. It has very little back focus of its own and uses a significant amount of the telescope's back focus. However, if you have the appropriate camera setup, this fine accessory will reduce your CDK's focal ratio while preserving its high level performance.\r\n\r\nA crucial factor in getting the most ideal performance out of your system is the back focus between the reducer and the focal plane. Optimally, this distance should be 1.85\", but you can adjust this measurement and still receive superb performance.\r\n\r\nPlanewave Product Number: \u003cstrong\u003e600166\u003c\/strong\u003e\u003c\/p\u003e","brand":"Planewave","offers":[{"title":"Default Title","offer_id":44912245130,"sku":"PI-600166","price":1400.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1594\/4815\/products\/55adf5d4a800747e9ce47d8fca71cec7.jpg?v=1561067344"},{"product_id":"explore-scientific-3-inch-0-7x-reducer-flattener","title":"Explore Scientific 3\" Field Flattener 0.7x Focal Reducer","description":"The Explore Scientific 3\" Field Flattener 0.7x Focal Reducer is a versatile accessory made to augment your astrophotography adventure. As a field flattener, this accessory will take care of annoying edge-of-field aberrations brought about by curved focal planes, resulting in clear, sharp images. As a focal reducer, this accessory will reduce your focal ratio by 0.7 for a wider field of view and increased image illumination in shorter exposure intervals. Explore Scientific recommend this accessory for their 102mm, 115mm, 127mm, 140mm, 152mm, and 165mm triplet APO refractors. Please note that if you have a telescope with a 2.5\" focuser, you will need \u003ca href=\"https:\/\/optcorp.com\/products\/explore-scientific-adapter-fffr507x-to-hex-focuser\" title=\"Explore Scientific Adapter for FFFR507X-00 to 2.5-Inch Hex Focuser\" target=\"_blank\"\u003ethis special adapter\u003c\/a\u003e. Features fully multi-coated optics and comes with a 3-inch Nosepiece, 2 adapters for various focuser sizes and a male T-thread (M42) adapter for the camera. An additional \u003ca href=\"https:\/\/optcorp.com\/products\/explore-scientific-m48-adapter-fffr\" title=\"Explore Scientific M48x0.75 Adapter for FFFR\" target=\"_blank\"\u003eM48 camera adapter\u003c\/a\u003e is sold separately. OPT Product Number: \u003cstrong\u003eES-FFFR507X-00\u003c\/strong\u003e\u003cbr\u003e \u003c!-- split --\u003e\n\u003cul\u003e\n\u003cli\u003eReduces focal ratio to 70-percent of its standard value ( 0.7x)\u003c\/li\u003e\n\u003cli\u003eCorrects Edge-of-Field aberrations\u003c\/li\u003e\n\u003cli\u003eBarrel Size: 3-inch\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003ePlease note that \u003ca href=\"https:\/\/optcorp.com\/products\/explore-scientific-adapter-fffr507x-to-hex-focuser\" target=\"_blank\"\u003eES-510366\u003c\/a\u003e is a \u003cspan style=\"color: #ff2a00;\"\u003eREQUIRED\u003c\/span\u003e adapter for all Explore Scientific triplet refractor telescopes with 2.5\" Hex focusers.\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- split --\u003e\n\u003cul\u003e\n\u003cli\u003e3-inch .7x Focal Reducer \u0026amp; Field Flattener\u003c\/li\u003e\n\u003cli\u003e3-inch Nosepiece Adapter\u003c\/li\u003e\n\u003cli\u003e2 adapters for various focusers\u003c\/li\u003e\n\u003cli\u003eT-Thread Adapter\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Explore Scientific","offers":[{"title":"Default Title","offer_id":44915196554,"sku":"ES-FFFR507X-00","price":479.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1594\/4815\/products\/UT-11936.jpg?v=1553316664"},{"product_id":"sky-watcher-focal-reducer-corrector-for-pro-ed80-s20200","title":"Sky-Watcher 0.85x Focal Reducer \u0026 Corrector for EvoStar 80ED","description":"This 0.85x Focal Reducer \u0026amp; Corrector was made for astronomers who are serious about astro-imaging. Developed for the Sky-Watcher EvoStar 80ED (also known as the Pro ED80), this superior quality accessory facilitates edge-of-field correction that is greatly improved while effectively reducing the telescope's focal length by a factor of 0.85x.\u003c!-- split --\u003e\n\u003cul\u003e\n\u003cli\u003eReduces focal ratio by a factor of 0.85x\u003c\/li\u003e\n\u003cli\u003eFor use with Pro ED80 Telescope\u003c\/li\u003e\n\u003cli\u003eFacilitates greatly improved edge-of-field correction\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- split --\u003e\n\u003cul\u003e\n\u003cli\u003eSky-Watcher 0.85x Focal Reducer \u0026amp; Corrector for EvoStar 80ED\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Sky-Watcher","offers":[{"title":"Default Title","offer_id":44915340426,"sku":"SW-S20200","price":370.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1594\/4815\/products\/bcda2cea02822327bfc75d3fbd7e1b68.jpg?v=1553311673"},{"product_id":"stellarvue-focal-reducer-field-flattener-for-f7-refractors-with-2inch-focusers","title":"Stellarvue 0.8X Reducer Flattener for f\/7 Refractors with 2\" Focusers","description":"\u003cp style=\"text-align: left;\"\u003eThe Stellarvue SFFR102-2 Reducer Flattener is optimized for use with f\/7 refractors with a standard 2\" focuser. The SV Reducer Flattener slips into the 2\" focuser and is snugged into place with the focusers set screws. A 48 mm filter thread is machined into the reducer flattener, allowing you to add standard 2\" filters when desired. The focal reduction of the SFFR102-2 is 0.8X, which converts your f\/7 refractor to f\/5.6.\u003c\/p\u003e\n\u003cp\u003eThe backfocus of the Stellarvue 2\" Reducer Flattener for f\/7 Refractors is 55 mm. Since a DSLR with t-ring has a 55 mm backfocus, it is a simple matter to use the reducer\/flattener for DSLR imaging. Just insert the reducer\/flattener into the telescopes focuser and then thread the camera\/t-ring combo onto the flattener. An example is shown in the additional images section to the left.\u003c\/p\u003e\n\u003cp\u003eIf you will be imaging with a CCD camera as opposed to a DSLR, extension tubes may be required to achieve focus. It is important that you know the distance between your cameras t-thread and the sensor, and it is equally important to remember that the distance from the back of the field flattener\/reducer to the CCD sensor remains at 55 mm. If the CCD camera, for instance has a backfocus of only 35 mm, a 20 mm extension will be needed. If any extension tubes are required for your set-up, they will thread between the camera and the field flattener, as shown in the example provided in additional images. Please note that the camera side of the reducer\/flattener requires extension rings with a standard t-thread (M42x.75).\u003c\/p\u003e\n\u003c!-- split --\u003e\n\u003cul\u003e\n\u003cli\u003ePer the manufacturer, this item is backordered until further notice.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Stellarvue","offers":[{"title":"Default Title","offer_id":44917083978,"sku":"SV-SFFR102-2","price":195.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1594\/4815\/products\/3adb9675677bdff46eb74a7361586e45.jpg?v=1500478685"},{"product_id":"stellarvue-focal-reducer-field-flattener-for-svr102t-telescope-with-2pt5-focusers","title":"Stellarvue 0.8X Reducer Flattener for SVR102T with 2.5\" Focuser","description":"\u003cp\u003e\u003cspan style=\"color: #000000;\"\u003e\u003cstrong\u003eThe 0.8X Reducer Field Flattener for the SVR102T with 2.5-Inch Focuser by Stellarvue:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #000000;\"\u003e\u003cstrong\u003eThe Stellarvue SFFR102-25 Reducer Flattener\u003c\/strong\u003e\u003c\/span\u003e is optimized for use with the SVR102T that sports either an SV 2.5-inch focuser or a 2.5-inch Feather Touch focuser.\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #000000;\"\u003e\u003cstrong\u003eThe SV Reducer Flattener\u003c\/strong\u003e\u003c\/span\u003e threads into the 2.5-inch focuser. A 48 mm filter thread is machined into the reducer flattener, allowing you to add standard 2-inch filters when desired.\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #000000;\"\u003e\u003cstrong\u003eThe focal reduction\u003c\/strong\u003e\u003c\/span\u003e of the SFFR102-25 is 0.8X, which converts your SVR102T to f\/5.6.\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #000000;\"\u003e\u003cstrong\u003eThe backfocus\u003c\/strong\u003e\u003c\/span\u003e of the Stellarvue 2.5-inch Reducer Flattener is 55 mm. Since a DSLR with a T-ring has a 55 mm backfocus, it is a simple matter to use the reducer\/flattener for DSLR imaging. Just insert the reducer\/flattener into the SVR102T focuser and then thread the camera\/t-ring combo onto the flattener. An example is shown in the additional images section to the left.\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #000000;\"\u003e\u003cstrong\u003eIf you will be imaging\u003c\/strong\u003e\u003c\/span\u003e with a CCD camera as opposed to a DSLR, extension tubes may be required to achieve focus. It is important that you know the distance between your camera's T-thread and the sensor, and it is equally important to remember that the distance from the back of the field flattener\/reducer to the CCD sensor remains at 55 mm. If the CCD camera, for instance has a backfocus of only 35 mm, a 20 mm extension will be needed. If any extension tubes are required for your set-up, they will thread between the camera and the field flattener, as shown in the example provided in additional images. Please note that the camera side of the reducer\/flattener requires extension rings with a standard T-thread (M42x.75).\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eOPT Product Number:\u003cspan style=\"color: #000000;\"\u003e\u003cstrong\u003e SV-SFFR102-25\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"Stellarvue","offers":[{"title":"Default Title","offer_id":44917090634,"sku":"SV-SFFR102-25","price":229.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1594\/4815\/products\/f4ac3eb72f1c09baed6b3ae9d3307f6e_9541d196-d9e5-43e2-9167-dd57281e0f38.jpg?v=1561068656"},{"product_id":"takahashi-645-0-7x-reducer-for-fsq-130ed","title":"Takahashi 645 0.7x Reducer for FSQ-130ED","description":"\u003cp\u003eThe Takahashi 645 Reducer 0.7X reduces the focal length of the FSQ-130ED telescope by 0.7X, increasing the speed of the optical system for astrophotography.  The reducer prodces a 70 mm diameter image circle that is ideal for larger imaging chips.\u003c\/p\u003e\n\u003c!-- split --\u003e\n\u003cul\u003e\n\u003cli\u003eReduces the focal length of the FSQ-130ED telescope by 0.7X\u003c\/li\u003e\n\u003cli\u003eProduces a 70 mm diameter image circle that is ideal for larger imaging chips\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- split --\u003e\n\u003cul\u003e\n\u003cli\u003eTakahashi 645 0.7x Reducer for FSQ-130ED\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Takahashi","offers":[{"title":"Default Title","offer_id":44925803786,"sku":"TK-TKA38580","price":2970.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1594\/4815\/products\/TKA38580.jpg?v=1603825089"},{"product_id":"takahashi-0-6x-f-3-0-reducer-for-fsq-106ed-xiii-x4","title":"Takahashi 0.6x F\/3.0 Reducer for FSQ-106ED","description":"\u003cp\u003e\u003cspan style=\"color: #000000;\"\u003e\u003cstrong\u003eThe 0.6x F\/3.0 Reducer for FSQ-106ED by Takahashi:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eThis splendid quality reducer allows you transform your F\/5 FSQ-106 ED or FSQ-130 ED telescope into an incredibly fast F\/3.0 configuration.\u003c\/p\u003e\n\u003cp\u003eThe high refractive index and low dispersion glass used in this reducer effectively suppresses lateral chromatic aberration and coma, further enhancing your viewing or imaging experience! \u003c\/p\u003e\n\u003cp\u003eOPT Product Number: \u003cspan style=\"color: #000000;\"\u003e\u003cstrong\u003eTK-TKA38581\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Takahashi","offers":[{"title":"Default Title","offer_id":44931350218,"sku":"TK-TKA38581","price":1990.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1594\/4815\/products\/69d480e6120bdc8a138b9a65866e9d71.jpg?v=1553306217"},{"product_id":"stellarvue-reducer-flattener-for-sv70t","title":"Stellarvue Reducer\/Flattener for SV70T","description":"\u003cp\u003eThis is a Reducer\/Flattener that has been optimized for Stellarvue's 70mm Triplet Lens. It threads smoothly into a Stellarvue 2.5\" A version focuser, and will also slide into the 2\" focuser for earlier model SV70ED's. 0.8X focal reduction converts the 70 mm f-6 to a 336 mm f-4.8- Stellarvue's widest field refractor to date!  This reducer\/flattener has a standard 48 mm filter thread, and standard 2\" filters can be added to the reducer flattener when imaging. The adapter takes camera's with a 42mm thread on that end of the link. The backfocus of the unit is 55 mm with the included 11 mm extension tube- but remove this tube and the backfocus increases to 66 mm. Since a DSLR with t-ring has a 55 mm backfocus, thread the SFFR-70APO and extension tube into the cameras t-ring, then screw it to the focuser as shown in the images above.  If you are using a CCD camera, an additional set of extension tubes may be needed depending on the backfocus of the camera. You need to know how much distance there is between the cameras T-thread and the ccd chip, as it is important that the distance from the back of the field flattener to the chip be maintained at 55 mm (66 mm without the supplied extension). So if the CCD camera has a backfocus of only 35 mm, the supplied 11 mm extension and an additional 20 mm extension will be needed. See the example above.  SV-SFFR-70APO\u003c\/p\u003e","brand":"Stellarvue","offers":[{"title":"Default Title","offer_id":44933000842,"sku":"SV-SFFR-70APO","price":269.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1594\/4815\/products\/6e956abdbb272cad0f43ea0240417566.jpg?v=1561065581"},{"product_id":"takahashi-fsq-106-645-qe-reducer-set-for-fsq-106ed","title":"Takahashi 645 QE Reducer Set for FSQ-106ED","description":"\n\u003ch3\u003eTakahashi 645 QE Reducer Set for FSQ-106ED\u003c\/h3\u003e\n\n Takahashi's potent large 645 QE reducer is a highly useful piece of equipment. This reducer uses four lenses in four groups to produce a large ??60mm image circle suitable for large chip CCD cameras. Each lens is individually of a high quality, and together they produce remarkable results. The reduction factor is 0.73x which produces f\/3.6 380mm with the FSQ-106ED. The result is a sharp image across the entire image circle. In order to give maximum rigidity to the reducer, the reducer screws into the rear cell of the FSQ.  Manufacturer Product Number: \u003cstrong\u003eTKA31580LS\u003c\/strong\u003e","brand":"Takahashi","offers":[{"title":"Default Title","offer_id":44935236170,"sku":"TK-TKA36580L","price":2860.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1594\/4815\/products\/49a55107ec0001f64b37ced4f90f7dc2_c763d7f0-e314-496c-8afe-3f73572217a1.jpg?v=1553306356"},{"product_id":"astro-physics-2-7-photo-visual-telecompressor-0-75x","title":"Astro-Physics 2.7\" Photo-Visual Telecompressor 0.75X","description":"\u003cp\u003eAstro-Physics has produced a splendidly high quality focal reducer that is very effective and adaptable. They have increased the versatility of their focal reducer (also called a Telecompressor) by designing a variety of accessories for photographic, CCD and visual applications. Installing this focal reducer to your focuser will alter the focal length to approximately 0.75 of its original value. As an example, an f\/6 instrument would be altered to a very fast f\/4.5.  This alteration makes it possible to capture deep sky objects on film in a fraction of the time required at prime focus. In addition, you can more effectively capture a large object or cluster of objects with the telecompressor. For instance, if you photograph at prime focus with a 35 mm camera on a 130 mm f\/6 StarFire, you will achieve a 1.7 x 2.4 degree field. If you use the telecompressor, the field size increases to 2.3 x 3.3 degrees at f\/4.5. This greatly increases the versatility of your refractor for imaging a wide variety of objects.  The accessory lens is well corrected so as to preserve the high contrast and superb color correction of the main objective, sacrificing none of the quality of whatever you've chosen to install your Telecompressor onto. While the telecompressor flattens the field to a certain degree, you may still notice some slightly elongated stars in the corners. This is less of an issue with CCD imaging when the chip size is smaller than a 35 mm negative.  The Telecompressor was designed to thread directly into the drawtube so as to place the optics forwards in the optical system. As a result of this design choice, the telecompressor can only be used with Astro-Physics 2.7-inch and 4-inch focusers and Starlight Instruments 3-inch and 3.5-inch focusers that have an end-cap adapter for Astro-Physics 2.7-inch accessories.  Information on how to calculate the compression factor and coverage for your particular setup (along with connection options adapter drawings in their links):  See \u003ca href=\"http:\/\/www.astro-physics.com\/tech_support\/accessories\/photo\/Telecompresssor-techdata.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eHere\u003c\/a\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eMagnification\/ Telescompression Graph:  \u003c\/span\u003eSee \u003ca href=\"http:\/\/www.astro-physics.com\/products\/accessories\/photo_acc\/CCDT67%20\u0026amp;%2027TVPH.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eHere\u003c\/a\u003e \u003c\/p\u003e\n\u003cp\u003e Manufacturer Product Number: \u003cstrong\u003e27TVPH\u003c\/strong\u003e\u003c\/p\u003e","brand":"Astro-Physics","offers":[{"title":"Default Title","offer_id":44935293962,"sku":"AP-27TVPH","price":285.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1594\/4815\/products\/ecdffc02dd01690d5675d5b10608b8cf.jpg?v=1553288889"},{"product_id":"celestron-reducer-edgehd-925","title":"Celestron 9.25” .7x Edge HD Focal Reducer","description":"\u003cp\u003e\u003cstrong\u003eCelestron’s 9.25-inch 0.7x EdgeHD Focal Reducer\u003c\/strong\u003e makes the 9.25-inch Edge HD OTA even more versatile than ever, this reducer dramatically increases your field-of-view while also increasing the brightness of your image whether you’re using it for visual use or astrophotography.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eFEATURES OF THE CELESTRON 9.25 EDGEHD FOCAL REDUCER AT A GLANCE\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e4-element optical layout designed specifically for the\u003cspan\u003e EdgeHD\u003c\/span\u003e\u003cspan\u003e 9.25-inch.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003eMaintains the same back focus as when used at f\/10.\u003c\/li\u003e\n\u003cli\u003eOne full F-Stop faster than f\/10.\u003c\/li\u003e\n\u003cli\u003eIncreases the field of view by 43%.\u003c\/li\u003e\n\u003cli\u003eLanthanum Glass Elements.\u003c\/li\u003e\n\u003cli\u003eFully multi-coated lens elements.\u003c\/li\u003e\n\u003cli\u003eBlackened edges.\u003c\/li\u003e\n\u003cli\u003eThreads directly onto the 3.25-inch threads of the EdgeHD optical tube. \u003c\/li\u003e\n\u003cli\u003eClear aperture.\u003c\/li\u003e\n\u003cli\u003eMachined aluminum housing.\u003c\/li\u003e\n\u003cli\u003eThreaded metal covers for both ends of the lens assembly.\u003c\/li\u003e\n\u003cli\u003eFastar compatibility and f\/2 imaging with optional accessory.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eAstrophotography Elements\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eAll 0.7x EdgeHD Focal Reducers cut the exposure time in half from the f\/10 configuration, capturing twice as much data in the same amount of time! Your focal reducer will shorten the focal length of the 9.25-inch EdgeHD from 2350 mm to 1645 mm, which will also speed up the focal ratio from f\/10 to f\/7. The corrected image circle for this focal reducer is 42 mm, which is large enough to illuminate a full-frame camera sensor. You will not need to change adapters or sensor spacing as this reducer maintains the same 146 mm backfocus as the 9.25-inch EdgeHD without the reducer. It also uses the same 3.3 to 16\/tpi threading found on the rear of the OTA.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eVisual Elements\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eSince this 0.7x EdgeHD Focal Reducer doesn’t change the backfocus of the telescope and has the same thread type as the rear cell of the OTA, you can attach the 2-inch mirror diagonal that comes with your Edge OTA. All the eyepieces that you own will work just the same, only now you will have a wider field of view and the image in eyepieces will be substantially brighter.\u003c\/p\u003e\n\u003c!-- split --\u003e\n\u003cul\u003e\n\u003cli\u003e4-Element Optical Design.\u003c\/li\u003e\n\u003cli\u003e42 mm Corrected Image Circle.\u003c\/li\u003e\n\u003cli\u003e146 mm Back Focus.\u003c\/li\u003e\n\u003cli\u003eOne full F-Stop Faster than f\/10.\u003c\/li\u003e\n\u003cli\u003eIncrease Field-of-View by 43%.\u003c\/li\u003e\n\u003cli\u003eBlackened Edges Reduce Internal Reflections.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- split --\u003e\n\u003cul\u003e\n\u003cli\u003e9.25-inch 0.7x Edge HD Focal Reducer.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cstyle\u003e\u003c\/style\u003e\n\u003cstyle\u003e\u003c\/style\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":2921466396682,"sku":"CE-94245","price":429.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1594\/4815\/products\/Celestron-9-25-7x-Edge-HD-Focal-Reducer.jpg?v=1522780821"},{"product_id":"baader-2-to-1-25-clicklock-reducer","title":"Baader 2\" to 1.25\" ClickLock Reducer","description":"\u003cp\u003e\u003cspan style=\"color: #000000;\"\u003e\u003cstrong\u003eThe Baader ClickLock System (1.25-inch to 2-inch) in an overview:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #000000;\"\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/span\u003e Never before has an eyepiece clamp for amateur astronomy been so elaborately crafted.\u003c\/p\u003e\n\u003cp\u003eThe Baader ClickLock (1.25-inch to 2-inch) is a precisely fitting, very massive eyepiece clamp without clamping screws! Inserted eyepieces, CCD cameras and similar accessories are securely held in place, locked against rotation and won't be scratched in any way! With a small turn of 20-degrees, each eyepiece is firmly clamped. You will never have to handle small locking screws again – instead, just rotate the top of the eyepiece clamp for a few degrees, and the eyepiece will be firmly fixed. This is also no problem with gloves on!\u003c\/p\u003e\n\u003cp\u003eBaader's various ClickLock clamps are made of seven precision-machined components which provide a highly effective retention mechanism that securely holds any 1.25-inch or 2-inch eyepiece. The clamp is very expensive to assemble, the price therefore initially may appear high for \"nothing more than\" a clamping device. But if you think about the comfort, precision and stability, it's well worth the money.\u003c\/p\u003e\n\u003cp\u003eYou do not have to tighten the ClickLock clamps with brutal force, because the mechanical principle comes from professional mechanical engineering. This is how the tool holder in modern CNC milling centers works. Clever use of leverage multiplies the torque. The inserted object is held on three sides similar to a quick-action chuck and can therefore no longer carry out any tilting movements.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cspan style=\"color: #000000;\"\u003e\u003cstrong\u003eDetails on Baader ClickLock Reducer from 2-inch to 1.25-inch:\u003c\/strong\u003e\u003c\/span\u003e\n\u003cul\u003e\n\u003cli\u003ePrecision machined reducer to complement the Baader 2-inch ClickLock-System, inserted height only 9.5 mm\u003c\/li\u003e\n\u003cli\u003eFirmly holds all 1.25-inch eyepieces, accessories, and diagonals\u003c\/li\u003e\n\u003cli\u003eClickLock compression ring made of hardened bronze ensures lifetime non-marring operation\u003c\/li\u003e\n\u003cli\u003eFingertip operated twist-lock system works like a CNC machine chuck – onto the compression ring\u003c\/li\u003e\n\u003cli\u003eBidirectional ratcheted lever (no thumbscrew!) indicates open\/close position in the dark\u003c\/li\u003e\n\u003cli\u003eGentle touch onto the lever results in ultra-strong locking action – and easy release\u003c\/li\u003e\n\u003cli\u003eAccepts all astronomical, cell-mounted 2-inch eyepiece-filters\u003c\/li\u003e\n\u003cli\u003eT-2 (M42 x 0.75) inner photo-thread attaches onto most T-2 threaded accessories and all Baader T-2 diagonals\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c!-- split --\u003e\n\u003cul\u003e\n\u003cli\u003e2-Inch to 1.25-Inch ClickLock Reducer is a precisely machined reducer \u003c\/li\u003e\n\u003cli\u003eInserted height is only 9.5 mm\u003c\/li\u003e\n\u003cli\u003eIt requires only light pressure on the ratchet lever to have an extremely strong hold\u003c\/li\u003e\n\u003cli\u003eThe ClickLock compression ring is made of hardened Bronze and ensures lifetime non-marring operation\u003c\/li\u003e\n\u003cli\u003eT-2 (M42 x 0.75) inner photo-thread attaches onto most T-2 threaded accessories and all Baader T-2 diagonals\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Baader","offers":[{"title":"Default Title","offer_id":2982349963274,"sku":"BA-T2-15B","price":87.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1594\/4815\/products\/BA-T2-15B_Baader-2-to-1-1-4-ClickLock-Reducer-t-2-part-15b.jpg?v=1523376577"},{"product_id":"william-optics-x0-72-reducer-flattener-8","title":"William Optics x0.72 Reducer Flattener 8","description":"\u003cp\u003eThe William Optics Revolutionary Adjustable x0.72 Reducer Flattener was made for f\/6 to f\/7.8 ratio refractors.\u003c\/p\u003e\n\u003cp\u003eThis high-quality flattener has been engineered and CNC machined for usage with their GT153, FLT 132, 102GTS, and other APO refractors.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eLens\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e• ED Triplet APO Designed to cover full size DSLR cameras with a clear lens aperture of 50 mm\u003c\/p\u003e\n\u003cp\u003e• STM coated with an excellent doublet air-spaced design\u003c\/p\u003e\n\u003cp\u003e• Produced entirely with the best Ohara optical glasses\u003c\/p\u003e\n\u003cp\u003e• Flattener Power: x0.72\u003c\/p\u003e\n\u003cp\u003e• 45 mm for a fully illuminated imaging circle\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAmazing\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e• It will flatten the field amazingly well and finally make you see those stars round!\u003c\/p\u003e\n\u003cp\u003e• This unique flattener works with WO or other 6-7.8 F ratio refractors.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSuperb Finish\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e• Superb William Optics anodized finish\u003c\/p\u003e\n\u003cp\u003e• All internal surfaces threaded and blackened for no reflections\u003c\/p\u003e\n\u003cp\u003e• Protecting covers are included on both sides\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eEasy to Use\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e• Will accept any standard T-ring for your camera (thread size M48x0.75).\u003c\/p\u003e\n\u003cp\u003e• Suitable for GT102,FLT 132, 102GTS (with minimum 3-inch focuser and our custom made by Feather Touch focuser) with focuser M92x1.0 thread.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"William Optics","offers":[{"title":"Default Title","offer_id":18471711768645,"sku":"WO-P-FLAT8","price":806.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1594\/4815\/products\/WO-P-FLAT8_William_Optics_x0.72_Reducer_Flattener_8-frontside.png?v=1543260751"},{"product_id":"sv-flattener-reducer-sv080a","title":"Stellarvue Field Flattener\/Reducer for SV080A Access","description":"\u003cp\u003e\u003cspan\u003eFocal Reducer\/Field Flattener for the new Stellarvue SV80A Doublet Apo. This IS NOT for the SV80ST Triplet.  \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThis reducer\/flattener is optimized for our SV80 Access doublet lens. The flattener inserts into the 2\" focuser. The 0.8X focal reduction converts the 80 mm f-7 into an f-5.6 with a focal length of  448 mm.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThis reducer\/flattener has a standard 42 mm filter thread and M48 thread on the opposite end. Standard 2\" filters can be added to the reducer\/flattener when imaging. The backfocus of the unit is 55 mm. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIf you are using a CCD camera, an additional set of extension tubes may be needed depending on the backfocus of the camera. You need to know how much distance there is between the cameras T-thread and the ccd chip. It is important that the distance from the back of the field flattener to the chip be maintained at 55 mm. If the ccd camera has a backfocus of only 35 mm, a 20 mm extension will be needed.\u003c\/span\u003e\u003c\/p\u003e","brand":"Stellarvue","offers":[{"title":"Default Title","offer_id":29184676790341,"sku":"SV-SFFR80A","price":189.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1594\/4815\/products\/SV-SFFR80A.PNG?v=1561656283"},{"product_id":"starizona-hyperstar-v4-925-edgehd","title":"Starizona Hyperstar v4 - 9.25 Celestron EdgeHD","description":"\u003cdiv class=\"short-description\"\u003e\n\u003cdiv class=\"std\" itemprop=\"description\"\u003eThe evolution of intelligent design has continued with Version 4 of the HyperStar 9.25. Version 4 is faster at f\/2.2, has a larger imaging circle of 28 mm, and produces significantly improved 30% smaller spot sizes. The design of the housing has also been modified to improve the ease and accuracy of collimation.\u003c\/div\u003e\n\u003cdiv class=\"std\" itemprop=\"description\"\u003e\u003c\/div\u003e\n\u003cp\u003e\u003cspan style=\"color: #000000;\"\u003e\u003cstrong\u003eThe HyperStar 4 Lens by Starizona (HD version) - For use with 9.25-Inch Celestron Edge HD Telescopes:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eHyperStar is based on Celestron's innovative Fastar feature. This feature allows the secondary mirror to be removed from Celestron's Edge HD telescopes. By mounting the HyperStar lens assembly in place of the secondary mirror, a CCD camera can be mounted at the front of the telescope allowing for a wider field of view and much faster imaging.\u003c\/p\u003e\n\u003cp\u003eSwitching from HyperStar to the telescope's normal f\/10 configuration is simple and fast. It takes only a minute or two, requires no tools, and the telescope's secondary mirror is indexed so no re-collimation is necessary.\u003c\/p\u003e\n\u003cp\u003eThe HyperStar lens assembly works with a variety of cameras from Atik, Orion, Meade, Mallincam, SBIG, Starlight Xpress and more. Different cameras require different adapters in order to preserve the critical backfocus distance of the HyperStar lens. One adapter is included with the HyperStar lens. Please specify the camera being used when ordering.\u003c\/p\u003e\n\u003cp\u003eA holder is included for safe storage of the secondary mirror while imaging.\u003c\/p\u003e\n\u003cp\u003eThe HyperStar systems allow a 9.25\" telescope to operate at a focal ratio of f\/2.2, an incredible 28 times faster than the standard f\/10 focal ratio! Images can be obtained in just seconds!\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003c\/strong\u003eSpecify\u003cspan\u003e \u003c\/span\u003eCamera\u003cspan\u003e \u003c\/span\u003eModel\u003cspan\u003e \u003c\/span\u003eand\u003cspan\u003e \u003c\/span\u003eMount\u003cspan\u003e \u003c\/span\u003eType In Product Notes.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- split --\u003e \u003cstrong\u003e\u003cspan style=\"color: #0000ff;\"\u003eTHIS IS A CUSTOM ORDER PRODUCT, ABSOLUTELY NO REFUNDS WILL BE GIVEN AFTER PURCHASE!\u003c\/span\u003e\u003c\/strong\u003e\n\u003cul\u003e\n\u003cli\u003eStarizona Hyperstar V4 lens assembly\u003c\/li\u003e\n\u003cli\u003eFor Celestron 9.25\" Edge HD Telescopes\u003c\/li\u003e\n\u003cli\u003eAdapter for your specified camera\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cstyle\u003e\u003c\/style\u003e","brand":"Starizona","offers":[{"title":"Default Title","offer_id":29495999987781,"sku":"S6-HS4-C925HD","price":1199.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1594\/4815\/products\/Starizona_Hyperstar_9.25_v4_side.PNG?v=1568329093"},{"product_id":"william-optics-x8-full-frame-reducer-flattener","title":"William Optics x0.8 Full-Frame Reducer-Flattener","description":"\u003cp\u003eThis Full Frame reducer from William Optics is compatible with several types of cameras including various DSLR models and both CCD and CMOS astronomy cameras. The back focus is listed below for each style of William Optics telescope or other DSLR you choose to use.\u003c\/p\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1594\/4815\/files\/William_Optics_Flattener_x0.8_Triplet_APO_Back_Focus_Chart_1024x1024.jpg?v=1569885639\" alt=\"William Optics Flat7A Back Focus\" style=\"float: none;\"\u003e\u003c\/div\u003e","brand":"William Optics","offers":[{"title":"Default Title","offer_id":30270202773573,"sku":"WO-P-FLAT7A","price":691.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1594\/4815\/products\/William_Optics_Flattener_x0.8_Triplet_APO_Design.jpg?v=1569884061"},{"product_id":"teleskop-service-rc-0-8x-corrector-reducer-for-ritchey-chretien-big-sensors-m68-connection","title":"Teleskop-Service RC 0.8x Corrector Reducer for Ritchey Chretien - big sensors - M68 connection","description":"\u003cp\u003eThis is the Teleskop-Service RC 0.8x Corrector Reducer for Ritchey Chretien - big sensors - M68 connection.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFocal Reducer and Field Corrector for Ritchey-Chrétien Telescopes:\u003c\/strong\u003eThis corrector reducer offers complete correction of the image field of RC telescopes with reduction of the focal length to 80% at the same time. Pure telecompressors will only reduce the focal length without correcting the image field. The result is an aberration (astigmatism) in the corners. The larger the sensor, the more pronounced the aberration.The TS-TSRCRED is designed especially for the image field of f\/8 RC telescopes, thus it eliminates the aberrations entirely. The results are sharper, pinpoint stars and easier focusing.This reducer is also the only one for full frame size sensors that can be used on the Teleskop-Service RCs from 1-inch with the large focusers, such as TS-TSFOCR30S.\u003cstrong\u003eAdapting the TS-TSRCRED to the telescope:\u003c\/strong\u003eThere are two ways of adapting to the RC telescope. You can thread the corrector to the focuser or countersink it into the drawtube if you have less than 135 mm working distance.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eConnection at telescope side: M68x1 thread (female).\u003c\/li\u003e\n\u003cli\u003eConnection at camera side: M68x1 thread (male).\u003c\/li\u003e\n\u003cli\u003eDiameter 74 mm - the corrector can be sunken into 3-inch focusers.\u003c\/li\u003e\n\u003cli\u003eWorking distance from the male M68x1 thread: 82 mm.\u003c\/li\u003e\n\u003cli\u003eThe focal length is shortened by the factor 0.8x and the speed is increased correspondingly.\u003c\/li\u003e\n\u003cli\u003eIn addition, the corrector eliminates the field aberrations of f\/8 RC telescopes, it works with all f\/8 RC telescopes, for example TS-Optics, AstroTec, CFF, Officina Stellare, ...\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eConnection via the female M68x1 thread on the telescope side: Via suitable adapters, you can attach the corrector to any focusers from 2.5-inch and greater. You just have to provide the focuser with a male M68x1 thread at the camera side. Please note:  You need at least 135 mm working distance from the male thread.Connection by countersinking the corrector into the drawtube at the same time: If there is less backfocus, the manufacturer recommends countersinking the corrector into the drawtube. Thus the necessary backfocus is reduced to less than 100 mm. Suitable adapters are: For focusers with the female M78x1 thread, like the TS-TSFOCR30S, the suitable adapter is TS-M78a-M68a.Connection for a camera to the TS-TSRCRED: The working distance from the male M68x1 thread at the camera side is 82 mm, thus you have enough space for individual adapters or accessories like off-axis guiders. The male thread is not taken into account for the working distance, as it disappears into the connection adapter.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c!-- split --\u003e\n\u003cul\u003e\n\u003cli\u003eThis corrector reducer offers complete correction of the image field of RC telescopes with reduction of the focal length to 80% at the same time.\u003c\/li\u003e\n\u003cli\u003eIt is designed especially for the image field of f\/8 RC telescopes, thus it eliminates the aberrations entirely.\u003c\/li\u003e\n\u003cli\u003eThe results are sharper, pinpoint stars and easier focusing.\u003c\/li\u003e\n\u003cli\u003eThis reducer is also the only one for full frame size sensors that can be used on the Teleskop-Service RCs. For 1-inch and up with the large focusers, such as TS-TSFOCR30S.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Teleskop Service","offers":[{"title":"Default Title","offer_id":31288465981509,"sku":"TS-TSRCRED","price":499.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1594\/4815\/products\/TS-tsrcred_Teleskop-Service-08x-reducer-rc-teleskope-1000.jpg?v=1585076908"},{"product_id":"sky-watcher-0-85x-evostar-72ed-reducer-flattener","title":"Sky-Watcher 0.85x EvoStar 72ED Reducer-Flattener","description":"The 0.85x Reducer \/ Flattener was specifically designed to be used with the Sky-Watcher EvoStar 72ED Refractor Telescope. When you add this reducer to your optical train, it will lower the native f\/5.8 focal ratio of the EvoStar 72ED down to f\/4.93 while dropping exposure time by 38%! It works well with both APS-C cropped sensors and full frame sensor cameras, but is better suited for APS-C and smaller sensors. The field of view measures 5.8 x 3.87-degrees with a full frame camera and 3.79 x 2.53-degrees with an APS-C crop sensor. This reducer \/ flattener contributes 55 mm of back focus. Included is a thread-on adapter to mount the reducer \/ flattener to the EvoStar 72ED focuser.\n\u003cstyle\u003e\u003c\/style\u003e","brand":"Sky-Watcher","offers":[{"title":"Default Title","offer_id":31883452612677,"sku":"SW-S20212","price":415.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1594\/4815\/products\/S20212_Evostar72_Reducer_wIncludedAdapter2web_1800x1800_cf76527b-b24e-4c79-be73-922cf9749f09.jpg?v=1614893682"},{"product_id":"sky-watcher-0-77x-evostar-150dx-reducer-flattener","title":"Sky-Watcher 0.77x Evostar 150DX Reducer-Flattener","description":"This reducer-flattener from Sky-Watcher is only compatible with the Evostar 150DX focuser. It has a built-in 2\" filter cell to mount filters into the light path. With a 34mm fully illuminated field, it is compatible with both APS-C and full frame sensors. It has a 2.22 x 1.48-degree field of view with a full frame camera and 1.45 x 0.97-degree FoV with an APS-C crop sensor. This reducer-flattener will drop your f\/ratio down from f\/8 (1200 mm) to f\/6.2 (930 mm), drastically reducing your exposure time by 66%! It has 89 mm of back focus (55 mm when a back focus spacer and M48 ring are installed). Included with the reducer-flattener are metal thread-on caps, a back focus spacer, and M48 thread adapter.\n\u003cstyle\u003e\u003c\/style\u003e","brand":"Sky-Watcher","offers":[{"title":"Default Title","offer_id":31883452645445,"sku":"SW-S20208","price":500.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1594\/4815\/products\/S20215_Evo150_RedFlat_web_1800x1800_22ca0664-25cd-4c81-af65-d60b27afb65c.jpg?v=1614811598"},{"product_id":"sky-watcher-0-77x-esprit-120ed-reducer-flattener","title":"Sky-Watcher 0.77x Esprit 120ED Reducer-Flattener","description":"Reducer-Flattener from Sky-Watcher that is specifically designed to accompany the Esprit 120 telescope. It has a back focus of 95mm (55mm when back focus spacer and M48 ring are installed). This reducer-flattener reduces exposure time by 68%, compared to the native f\/7. The f\/ratio drops dramatically from f\/7 (840mm) to f\/5.4 (647mm). It is equipped with a built-in 2\" filter cell to mount your imaging filters. When using a full frame camera, the field of view is 3.18 x 2.12- degrees, and with an APS-C crop sensor camera FoV is 2.08 x 1.39-degrees. This reducer-flattener has a 34mm fully illuminated field, but it can expertly handle full frame as well.\n\u003cstyle\u003e\u003c\/style\u003e","brand":"Sky-Watcher","offers":[{"title":"Default Title","offer_id":31883452678213,"sku":"SW-S20209","price":525.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1594\/4815\/products\/S20209_Esprit120_RedFlat_web_1800x1800_ef3d998e-2cde-486b-a804-450655d06324.jpg?v=1614810949"},{"product_id":"sky-watcher-0-77x-reducer-flattener-for-esprit-150ed-triplet-m48-thread","title":"Sky-Watcher 0.77x Reducer\/Flattener for Esprit 150ED Triplet - M48 Thread","description":"\u003cp\u003eOptically matched for the Sky-Watcher Esprit-150 ED Triplet refractor telescope. Provides a fully illuminated and corrected 36mm image circle suitable for sensor formats up to APS-C. This three-element focal reducer\/flattener has a reduction factor of 0.77x. for imaging at f5.4. 55mm back focus for use with M48 Canon EOS or Nikon adaptor rings. Includes a standard adaptor with M48 thread. Removing the adaptor reveals an M71x1 internal thread with a maximum of 75mm back focus for self-made adaptor solutions.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eFeatures \u0026amp; Specification\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eThree-element design\u003c\/li\u003e\n\u003cli\u003eFully Multi-Coated optics\u003c\/li\u003e\n\u003cli\u003e36mm Imaging Circle\u003c\/li\u003e\n\u003cli\u003e2-Inch filter compatible\u003c\/li\u003e\n\u003cli\u003e75mm back-focus or 55mm with the supplied adapt3r\u003c\/li\u003e\n\u003cli\u003eM42x0.75 adapter (T2)\u003c\/li\u003e\n\u003cli\u003eGreen anodized aluminum screw-on end caps\u003c\/li\u003e\n\u003cli\u003eNet weight 910g (with end caps)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- split --\u003e\n\u003cul\u003e\n\u003cli\u003eProvides a fully illuminated and corrected 36mm image circle suitable for sensor formats up to APS-C\u003c\/li\u003e\n\u003cli\u003eThis three-element focal reducer\/flattener has a reduction factor of 0.77x. for imaging at f5.4\u003c\/li\u003e\n\u003cli\u003e55mm back focus for use with M48 Canon EOS or Nikon adaptor rings\u003c\/li\u003e\n\u003cli\u003eRemoving the adapter reveals an M71x1 internal thread with a maximum 75mm back focus for self-made adaptor solutions\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- split --\u003e\n\u003cul\u003e\n\u003cli\u003eSky Watcher 0.77x Reducer\/Flattener\u003c\/li\u003e\n\u003cli\u003eM48 standard adapter\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Sky-Watcher","offers":[{"title":"Default Title","offer_id":31883452710981,"sku":"SW-S20215","price":525.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1594\/4815\/products\/S20215.jpg?v=1612457319"},{"product_id":"baader-universal-alan-gee-ii-telecompressor","title":"Baader Universal Alan Gee II Telecompressor","description":"\u003cp\u003eThe \u003cstrong\u003eBaader Universal Alan Gee II Telecompressor\u003c\/strong\u003e is the only Schmidt-Cassegrain telecompressor\/reducer and flatfield corrector that was designed to also work with a Binoviewer.\u003c\/p\u003e\n\u003cstyle\u003e\u003c\/style\u003e\n\u003cp\u003eA \u003cstrong\u003ebinoviewer\u003c\/strong\u003e with T-2 thread, like the MaxBright II or Mark V Giant Binocular, can be attached to the Universal Alan Gee II (UAGII). The distance to the eyepieces is then about 120mm.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1594\/4815\/files\/universal-alan-gee-ii-telecompressor-uag-ii-121_1800x1200_66cb0450-7928-4d8e-801c-7252f1d64827_480x480.jpg?v=1602268559\" style=\"display: block; margin-left: auto; margin-right: auto;\"\u003e\u003c\/p\u003e\n\u003cp\u003eThe standard Alan Gee Telecompressor was designed as a reducer for \u003cstrong\u003eSchmidt-Cassegrain telescopes\u003c\/strong\u003e, which also offers a flat field. The UAGII puts the optical elements of the standard Alan Gee in a 2\" nose piece with an additional T-2 thread on the telescope side.\u003c\/p\u003e\n\u003cp\u003eThe Universal Alan Gee II can be directly attached to all Baader T-2 \u003cstrong\u003estar diagonals\u003c\/strong\u003e with the included Baader T-2\/7.5mm extension tube. You need a T-2 eyepiece clamp and, depending on the desired distance\/reduction factor, a T-2-extension. The UAGII should be as close to the telescope as possible, so the optional Baader T Adapter (BTA) for SC and MAK Telescopes (T-2 part #21) are recommended.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1594\/4815\/files\/universal-alan-gee-ii-telecompressor-uag-ii-336_1800x1200_a3d8dccd-07cb-4a37-8d72-eb825b891806_480x480.jpg?v=1602268722\" style=\"display: block; margin-left: auto; margin-right: auto;\"\u003e\u003c\/p\u003e\n\u003cp\u003eYou may also use the UAGII with a \u003cstrong\u003ecamera\u003c\/strong\u003e up to APS-C sensor size. The distance between the UAGII and camera should be 121mm. For photography, the Alan Gee Telecompressor Mark II is still recommended since the UAGII was designed to be placed inside the baffle of a Schmidt-Cassegrain.\u003c\/p\u003e\n\u003c!-- split --\u003e\n\u003cul\u003e\n\u003cli\u003e Universal Alan Gee II Telecompressor Optical Length \u0026lt; 50mm \u003c\/li\u003e\n\u003cli\u003e Preconfigured for use with T-2 thread on Maxbright II Binocular and Mark V Giant-Binocular with T-2 quick changer\u003c\/li\u003e\n\u003cli\u003e Baader T-2 \/ 7.5mm Extension Tube is included\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Baader","offers":[{"title":"Default Title","offer_id":31893244411973,"sku":"BA-UAGII","price":199.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1594\/4815\/products\/universal-alan-gee-ii-telecompressor-uag-ii-7cd_1_2000x1333_909371c9-ac96-4ed6-a534-a04cd96f2d8a.jpg?v=1602268506"},{"product_id":"tk-tka86580l-takahashi-645-reducer-ca-72x-cca-250","title":"Takahashi 645 0.72x Reducer for CCA-250","description":"\u003cp\u003eThe Takahashi 645 Reducer-CA 0.72X reduces the focal length of the CCA-250 telescope by 0.72X, increasing the speed of the optical system for astrophotography. The reducer produces a 60 mm diameter image circle that is ideal for larger imaging chips.\u003c\/p\u003e\n\u003c!-- split --\u003e\n\u003cul\u003e\n\u003cli\u003eReduces the focal length of the CCA-250 telescope by 0.72X, increasing the speed of the optical system for astrophotography\u003c\/li\u003e\n\u003cli\u003eProduces a 60 mm diameter image circle that is ideal for larger imaging chips\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- split --\u003e\n\u003cul\u003e\n\u003cli\u003eTakahashi 645 0.72x Reducer for CCA-250\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Takahashi","offers":[{"title":"Default Title","offer_id":31921793695813,"sku":"TK-TKA86580L","price":2610.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1594\/4815\/products\/TKA86580L.jpg?v=1603825537"},{"product_id":"teleskop-service-reducer-t2-to-1-25","title":"Teleskop Service Reducer - T2 to 1.25\"","description":"This adapter from Teleskop Service is perfect if you have a T2 thread connection and want to attach 1.25\" eyepieces or adapters. You can adapt T2 extension rings, giving you the ability to operate eyepiece projection. The T2 adapter can also become the base for eyepiece projection. It measures at 31 mm long (without external thread).\n\u003cstyle\u003e\u003c\/style\u003e\n\u003c!-- split --\u003e\n\u003cul\u003e\n\u003cli\u003eTelescope Side: T2 Internal Thread\u003c\/li\u003e\n\u003cli\u003eReduction from T2 to 1.25\"\u003c\/li\u003e\n\u003cli\u003ePrecise ring clamping with 2 screws\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Teleskop Service","offers":[{"title":"Default Title","offer_id":32042993745989,"sku":"TS-TST2-1-T2L","price":34.59,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1594\/4815\/products\/Screenshot2021-01-20152518.png?v=1611181536"},{"product_id":"optec-lepus-acf-62x-telecompressor","title":"Optec Lepus ACF 0.62X Telecompressor Focal Reducer Lens","description":"\u003cp\u003eLepus-ACF 0.62X telecompressor lens designed especially for use with the Meade ACF OTA.  Featuring a standard SCT 2\"x24tpi thread, the Lepus-ACF screws directly on to the rear cell thread of the Meade classic and ACF telescopes.\u003c\/p\u003e \n\u003cp\u003eFor use with any Lepus camera mount or VLC camera mount having the OPTEC-2100 2.1-inch dovetail receiver.\u003c\/p\u003e\n\u003cp\u003eSee \u003ca href=\"https:\/\/www.optecinc.com\/astronomy\/catalog\/lepus\/lepus_mounts.htm\" target=\"_blank\"\u003eLepus Camera Mount table\u003c\/a\u003e for recommended length camera mount.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eTelescope-Side Compatibility:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFits Meade 2\" x 24tpi male thread\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eCamera-Side Compatibility:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/optcorp.com\/products\/optec-lepus-universal-t-adapter-50\" target=\"_blank\"\u003eOptec's Universal T-thread M42 camera mount\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003eOptec's Universal M48x0.75mm camera mount\u003c\/li\u003e\n\u003cli\u003eOptec's Universal M54 x 0.75mm camera mount\u003c\/li\u003e\n\u003cli\u003eOptec Variable Length Camera adapter with T-threads\u003c\/li\u003e\n\u003cli\u003eOptec Variable Length Camera adapter with STL threads\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- split --\u003e\n\u003cul\u003e\n\u003cli\u003eDesigned for the Meade ACF OTA\u003c\/li\u003e\n  \u003cli\u003eDesigned for the use with any Lepus camera mount or VLC camera mount having the OPTEC-2100 2.1-inch dovetail receiver\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- split --\u003e\n\u003cul\u003e\n\u003cli\u003eOptec Lepus ACF 0.62X Telecompressor Focal Reducer Lens\u003c\/li\u003e\n\u003c\/ul\u003e\n","brand":"Optec","offers":[{"title":"Default Title","offer_id":39423859261509,"sku":"OP-19406","price":250.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1594\/4815\/products\/lepus.jpg?v=1626123981"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1594\/4815\/collections\/Focal_Reducers.jpg?v=1561150138","url":"https:\/\/optcorp.com\/collections\/focal-reducers.oembed?page=2","provider":"OPT Telescopes","version":"1.0","type":"link"}