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Celestron EdgeHD 8" OTA with CGE Dovetail Plate

SKU : CE-91030-XLT

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  • 8-inch EdgeHD Corrected Schmidt-Cassegrain OTA, perfect for visual use or astrophotography.
  • f/10 focal ratio for deep-sky and planetary astrophotography. Fastar Compatible to f/2 for wide-field astrophotography.
  • StarBright XLT Optical Coatings to maximize light transmission for optimal visual and imaging use.
  • Finder, Diagonal, and Eyepiece Included.
  • Aluminum Tube; only 14 lb.
  • With the included CGE dovetail, it's ready to attach to a CGE or D-Style dovetail receiver.

Product Details

  • The Celestron EdgeHD 8" OTA with CGE Dovetail Plate is part of the revamped EdgeHD Telescope Series by Celestron. Get pinpoint, high-definition star images with Celestron EdgeHd’s coma-free performance and built-in flattener to ensure sharp focus all the way to the edge-of-field. See the Universe in HD!

    Celestron EdgeHD 8" OTA at a Glance
    • Mirror Support Knobs and Flexible Tension Clutches - hold the mirror in place and reduce image shift when rotating the tube around the mount.
    • Tube Cooling Vents - located on the rear cell allow hot air to be released from behind the primary mirror.
    • Fastar Versatility - All EdgeHD optical tubes are Fastar compatible for imaging down to f/2 with optional accessories.
    • Brighter Star Images - Light becomes more concentrated when focused precisely. This maximizes image brightness.
    • Dovetail Plate - for attaching to CGE mounts.
    • Sturdy Handle and Large Focusing Knob for your ergonomic needs.

    Special Features of the Celestron EdgeHD 8" OTA

    True Astrograph Quality

    EdgeHD optics produce a focal plane more than three-times flatter than a standard Schmidt-Cassegrain telescope and dramatically flatter than competing coma-free designs. This guarantees you visibly sharp stars across some of the largest CCD chips available today. 

    Improved Performance

    Superior edge performance not only creates a rounder, more pleasing stars but actually improves the resolution and limiting magnitude when compared to telescopes of equal aperture. With Celestron’s StarBright XLT optical coatings on every surface, EdgeHD optics gives you maximum light across the widest visual and photographic spectrum.

    Mechanical Features

    In addition to EdgeHD’s optimized optical design, the telescope tube has been redesigned to make sure you get the most from your optics each and every night.

    • Mirror Clutches -Flexible tension clutches hold the mirror in place and reduce image shift when taking long-exposure astro-images. Once focused, the flexible rods allow the mirror to be held in place without putting any force or pressure on the mirror assembly, keeping the image centered in the eyepiece (or on the sensor).
    • Tube Vents - Cooling vents located on the rear cell allow hot air to be released from behind the primary mirror. Each vent has an integrated 95-micron micromesh filter guaranteed to let warm air out without letting dust in.
    • Fastar Versatility - All EdgeHD optical tubes are Fastar-compatible, allowing the secondary mirror to be removed and replaced with a third party lens accessory for ultra-fast f/2 wide-field imaging. Add the optional reducer lens—custom-designed for your size EdgeHD tube—and you can increase your field of view without sacrificing optical performance.

    Individually Tested

    Every EdgeHD that ships have been tested not only for the surface quality of each optical component but also with a camera and artificial star to ensure the imaging system meets our rigid quality assurance. This “final acceptance test” confirms the EdgeHD will perform in the field and deliver high-quality astro-images. 

    OPT Product Number: CE-91030-XLT

  • specifications

    Aperture203 mm (8")
    Aperture203.2 mm (8")
    Camera/Eyepiece Connection24 TPI)
    Dawes Limit0.57 arcseconds
    Focal Length2032 mm
    Focal Ratiof/10
    Free ShippingYes
    Highest Magnification406.4x
    Light Gathering Power843x
    Limiting Magnitude15.3
    Optical DesignModified SCT
    Optical DesignSCT
    OTA Length17"
    OTA Mount TypeCGE Dovetail
    OTA Weight14 lbs.
    Tube Length432mm
    Tube Weight14 lbs
    Warranty2 Year Warranty
  • included items

    • Celestron EdgeHD 8", 203.2 mm (8-inch) Corrected Schmidt-Cassegrain OTA.
    • 9x50 Optical Finderscope.
    • 1.25-inch Star Diagonal. 
    • 1.25-inch Eyepiece/ 40 mm Plossl, 51x mag.
    • Dovetail Plate, CGE mount compatible. 
    • 2 Year Warranty.

Product Reviews

Customer Reviews
4.6 Based on 13 Reviews
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    United States United States


    After waiting for months, too many, I got a big package at the door, low and behold, the optic scope... Got the box opened and Wow, nice. I looked it over and was amazed with the tube. I went to mount it on the evo arm mount and the dove tail was too big for the mount, bummer, but after looking the tube over, I took the dove tail off my evolution and swapped them. When I ordered the scope, I said I need the narrow dove tail to fit the mount, ok done deal. Well never happened, but I got the scope any how. Now after mounting and getting it all ready, after READING the manual, took it outside and looked at the moon and what a view, so clear and perfect. I now have to wait for the weather to give me a break here in Hawaii. Now is the problem with the change in weather this year, will have to just wait for the right time. But I am happy with the unit, and have installed my starsence and auto focuser on board which makes it easier to operate. I did get the finder scope with the unit but its more of a problem to use that my laser pointer, and with that pin pointing a star is right on. Thanks to OPT for the Optic 8"HD, very happy to make the move and get it. Its worth the time of waiting, through the Trump screw up and being locked down all this time.

    Tim L.
    United States United States

    What a HUNK!!

    They say once you go Black you’ll never go back!! When this hunk of chiseled steel showed up at my front door .. I knew my nights would never be the same again... bringing better balance into my life and loving a good night under the stars, it’s a match made in heaven.. I love the strong silent types with a rough exterior.

    United States United States

    Good Reliable Mount

    I've had my CGEM II for about a year. I do mostly imaging with it and it tracks very well. Auto guiding is very effective. I usually run sub frames at around 30 second exposures but routinely run them for an hour or more. There is very little error during that time. I mount an 11 inch edge with hyperstar which is about the maximum the mount can handle. However I've never felt like it's overloaded even with camera, guide scope, asiair etc. hanging on it. Balance is important as I find you need to pick your target and then balance it with a slight over heavy on the front end. If you're having any trouble, spend a bit more time with balancing. Definitely a great mount for the price.

    Michael L.
    United States United States

    Great for 2008, not 2021.

    I've had my CGEM II for now about 7 months, and it has been a mess to deal with. I would recommend this mount ONLY if you're doing strict visual observing, and not astrophotography, as this mount is IMPOSSIBLE to guide under 1.5-2" RMS I've hypertuned my mount, and it didn't help much. I'm using it with a C8 Edge HD, so not even loading it up, with perfect balance, and an Off-Axis-Guider, and it cant manage sub arcsecond guiding even on good nights, leaving me to do visual. Summary: A mount that looks sexy, seems promising, but fails to perform like its competitors- for nearly 100$ more, using technology that is far too outdated, (not even a USB port on the thing), and hostile towards astrophotographers using longer focal lengths. If you're looking at this mount, save the hastle, and the nearly 100$ extra for the CGEM, and go grab an EQ6R PRO, as it has a handle (doesn't sound like a lot, but trust me, it is NECESSARY for grab n go.), belt drives (A must for guiding), and so much more. I'm gonna go order my Astro-Physics Mach2GTO-L now.

    OPT Telescopes Celestron CGEM-II 800 EdgeHD Telescope - CE-12017 Review
    Michael L.
    United States United States

    Amazing, Simple, High quality.

    I've had my C8HD for about 5 months now, and all I can say about it are good things. F/10, While slow, can be overcome with long exposures. I'm using it on my Hypertuned CGEM II mount, ZWO OAG, ZWO M42 Filter Drawer, and Optolong CLS and it is having no issue doing exposures over 5> minutes. While it is a larger tube, it is surprisingly easy to handle due to the large CGE plate, and the handlebar that sits on the image train end of the scope, which makes balancing SO MUCH EASIER. Works wonderfully, and I can say without a doubt is probably one of the best scopes on the market. Images: Orion, 15 x 60s, The full rig, and M66 and 65 145 x 30s (poorly processed, one of my first shots with it).

    OPT Telescopes Celestron CGEM-II 800 EdgeHD Telescope - CE-12017 ReviewOPT Telescopes Celestron CGEM-II 800 EdgeHD Telescope - CE-12017 ReviewOPT Telescopes Celestron CGEM-II 800 EdgeHD Telescope - CE-12017 Review
    Donald K.
    United States United States

    Not yet

    I will not have my observatory until March so have not had the scope and mount in observing mode. I have done the finder scope alignment and I do like the spring loading feature on the rear of the mount. The slewing is a little loud in speeds 8 and 9 but pretty quite in the slower speeds. The unit went together easily and is quite robust. I think the lock lever does conflict a little with the knobs to tighten the dovetail, but it is a minor issue. I will put it through it’s paces come spring and maybe do another review.