Optec - NextGEN MAXfield NGM 0.33X Telecompressor Lens

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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.
SKU: OPT-17403
Manufactured by:
Optec
 

Product Description

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.


Ray Tracing

 

The optical design of the 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 a SCT with the inherit aberrations of this telescope. The resulting lens curvatures of this designed were made without adjusting the radii to the optical lab's tool list. Custom tools were made for all surfaces.

Specifications

Name Optec - NextGEN MAXfield NGM 0.33X Telecompressor Lens
Manufacturer Optec
Model OPT-17403
Custom Stock Status Ships in 3-5 Days

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