Second generation MAXfield telecompressor design with 0.33X reduction. Complete redesign of Optec’s premier f/3.3 reducer provides better color correction and a longer back-focus distance. Now compatible with SBIG’S CFW-8 color wheel. Stk. #17430, violet light rejection filter included.
(NOTE: Order NextGEN CCD camera mounting plate separately)
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 NextGEN Series is the second generation of telecompressor lens systems designed by Optec. The first generation was available for the early CCD cameras such as the SBIG ST-6 and Meade 416. Improvements in CCD designed has warranted a complete redesign of our telecompressors which we offer now. These designs have been optimized by the premier Zemax optical design program and are made to the highest optical standards. All optical surfaces are polished to a 60-40 cosmetic quality and coated with a hard broadband coating for maximum transmission and durability. No finer telecompressor is available.