Correctors and Reducers

Transforms Askar 103APO to an f/4.08, 420.24mm focal length system Quadruplet optical design provides field flattening for full-frame sensors Stan...

0.75x Reduction Factor Transforms Askar 71F to f/5.2 New Focal Length: 369mm Standard 55mm Back Focus Triplet Optical Design Description FAQ Sp...

0.76x reduction factor specifically for the Askar 80PHQ Reduces focal ratio from f/7.5 to a faster f/5.7 Creates a new focal length of 456mm Gener...

0.7x Focal Reduction Factor 44mm Full-Frame Image Circle Maintains a Standard 55mm Backfocus 3-Element Air-Spaced Design with ED Glass Optimized f...

Reduces telescope focal ratio to a faster f/5.44 Shortens 103APO focal length to 560.32mm for wider fields Triplet optical design provides field f...

Reduces Askar 120APO to a fast f/5.6 focal ratio Shortens focal length to 672mm for wider fields of view Triplet optical design provides field fla...

Corrects field curvature and coma for the Askar 103APO Maintains the native 700.4mm focal length and f/6.8 ratio Triplet optical design delivers s...

Designed specifically for the Askar 120APO Telescope 1x Magnification Factor Triplet Optical Design Maintains Native f/7 Focal Ratio Standard 55mm...

Reduces focal ratio to a fast f/3.9 0.7x reduction factor 44mm image circle fully illuminates full-frame sensors Standard 55mm back focus for easy...

Reduces FRA600 focal ratio to F/3.9 Designed for full-frame sensors Maintains a standard 55mm backfocus Features integrated M48 (2-inch) filter th...

A common limitation that plagues owners of most popular Schmidt-Cassegrain telescopes is the narrow field size and high magnifications produced by ...

Apochromatic, multi-coated fluorite lens system 10-times higher line resolution than the world best projection eyepieces The FFC fits on every T-2...

3-lens field corrector for BAADER APO 95/560 CaF2 Travel Companion 76.11mm backfocus, 52mm corrected field of view Telescope side M68a thread, cam...

Coma corrector for Newton telescopes, that reduces neither the focal length nor the image field of your telescope Large lenses for completely vign...

The RCC I (Rowe Coma Corrector) is a Coma Corrector from Dave Rowe with Triplet Lense design for f/4 Newtons The RCC works from f/3.5 to f/6 - it ...

Reduces telescope focal length by 37% Converts f/10 SCTs to f/6.3 and f/11 systems to f/7 Compatible with Celestron C5, C6, C8, C9.25, C11, and C1...

Reduces EdgeHD 1100 focal ratio to f/7.7 5-element optical design with Lanthanum glass Increases field of view by 43% Maintains EdgeHD flat-field ...

Reduces EdgeHD 1400 focal ratio by a factor of 0.7x Custom 5-element optical design preserves flat-field imaging Provides a generous 146mm of back...

Reduces focal length by a factor of 0.7x, changing the EdgeHD 800 from f/10 to f/7 4-element optical design maintains the native flat-field perfor...

Reduces focal ratio by a factor of 0.7x for faster imaging 4-element design maintains the native flat-field performance of the EdgeHD 9.25" Provid...

55mm back focus Works with f/5 to f/7 refractors Compatible with APS-C size cameras or smaller. Accepts 2" filters Optimized for refractors with...

55mm back focus Works with f/5 to f/7 refractors Compatible with APS-C size cameras or smaller. Accepts 2" filters Optimized for refractors with...

55mm back focus Works with f/5 to f/7 refractors Compatible with APS-C size cameras or smaller. Accepts 2" filters Optimized for refractors with...

This is a field flattener for refractor-type telescopes with a focal ratio of f/5 to f/7 Causes no change to the telescope focal length 2-inch...