Optec NextGEN MAXfield 0.33X Telecompressor Lens
Optec NextGEN MAXfield 0.33X Reducer
The Optec NGM (Next Generation MaxField) telecompressor 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.
The 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.
You will need to order a NEXGEN CCD Mounting Plate in order to attach this telecompressor to your CCD camera. Choose from a selection of mounting plates listed in the "Accessories" tab to your left.
If you do not see the mounting plate for your CCD camera, or you have any questions, please feel free to contact our Internet Sales Department by email or by phone at 1-800-483-6287. Thanks!
Photo shows the SCT mount and CCD Camera Mount, both of which are sold separately.
Optec Product Number: 17403
Questions & AnswersAsk a Question
How (or can) this be used with a Starlight Express Lodestar X2?
Yes, this will work, but you will need Optec part OP-17399-1.90. This is a special order item and is not on the website, though the cost is $60 and the shipping will be the same as for this item http://www.optcorp.com/optec-nextgen-mount-plate-any-standa
How do you tell it whether you want it to be red light or white light? Do you have to cycle through the white to get the red to turn on or turn off? Can you set it to always use only red and never show white light?
According to Meade, the cycle is Off -> Red LEDs (6) -> White LEDs (10) -> Off. There are effectively 3 settings with this flashlight.
Does the NextGen 0.33 reducer fit to the Celestron 9.25 EHD?
Unfortunately, the Optec NextGen reducer is intended to be used only on a standard SCT, meaning that it will not work properly on an EdgeHD telescope because the spacing will be wrong for the telescope's rear flattener (which will cause the field to not b
What adapter is required to use Optec NextGEN MAXfield 0.33X with ZWO ASI178MC cooled? I do not understand the relation between camera back focus & length of the Optec adapter tube: http://www.optecinc.com/astronomy/catalog/nextgen/nextgen_mounts.htm
The key information for figuring the adapter length is this note right above the chart: Add the tube length, which is equal to 2.39 - BF, with BF measured in inches. The back focus of the ASI178MC cooled is 12.5mm or 0.49", so the appropriate adapter le
Hi Chris: I have a optec reducer 0.33X and I want to use it with SCT 9.25" with moonlite mortorized focuser and ST-9XME with CFW8. The CFW has only narrow band filters that avoid to get a star for guiding, and I need to use my sbig remote guide head with
Hello Angel. Unfortunately, you cannot use this reducer with the SBIG ST-8 and CFW-8. The 0.33x reducer will only cover a 9mm diameter field (your sensor is 16mm across) so you will see distortion on your CCD and will not be able to use the guide CCD at
?11 ? ?????? Canon600d ??? ?? ????? ????????? C11 and Canon600d camera how will it work?
Unfortunately, this will not work with a Canon DSLR. The corrected field is 9mm in diameter, and the 600D has a sensor diagonal of 28mm. Less than 1/3 of the sensor will be usable.