Field Flatteners & Reducers

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...

Reduces focal length by a factor of 0.8x for wider fields of view Designed for Explore Scientific 80mm f/6 and 102mm f/7 refractors Provides 55mm ...

Reduces focal ratio by a factor of 0.7x for wider fields and shorter exposures Functions as a field flattener to correct edge-of-field aberrations...

Corrects field curvature for pinpoint stars edge-to-edge Optimized for refractor telescopes with f/5 to f/7 focal ratios Requires a precise 55mm (...

Reduces focal length by a factor of 0.8x Widens the photographic field of view Flattens the image field for sharp, edge-to-edge stars Designed for...

Reduces focal ratio to f/4.8 0.74x reduction factor 3-element optical design 44mm corrected image circle Standard 55mm back focus Description F...

Reduces telescope focal ratio to f/4.6 Converts focal length to 230mm Quadruplet optical design with field flattening Standard 55mm back focus req...

Converts the SharpStar 61EDPH to a fast f/4.5 astrograph Provides a 44mm image circle for full-frame sensor coverage Three-element air-spaced opti...

Converts 76EDPH to a fast f/4.5 focal ratio Produces a 44mm image circle for full-frame sensors Standard 55mm back focus for easy camera integrati...

0.8x Focal Reduction for SharpStar 94EDPH Creates a Fast f/4.4 Optical System 4-Element Optical Design 50mm Corrected Image Circle Standard 55mm B...

Field Flattener Matched to the Esprit 100EDX 44mm Corrected Image Circle Point-Like Stars Across Full-Frame Sensors Designed for the Esprit 100EDX...

Dedicated Field Flattener for the Sky-Watcher Esprit 120EDX Flat Field Across a 44mm Image Circle Covers Full-Frame (36 x 24mm) Camera Sensors Mat...

Dedicated Field Flattener for the Sky-Watcher Esprit 150EDX Flat Field Across a 44mm Image Circle Covers Full-Frame (36 x 24mm) Camera Sensors Mat...

0.92x Reducer/Flattener Compatible with the Esprit 70EDX and Evostar 100EDX 44mm Image Circle for Full-Frame Sensors Esprit 70EDX: 490mm f/7 to 45...

0.7x Reducer Matched to the Skymax 200DX Converts 2000mm f/10 to 1400mm f/7 43mm Image Circle for APS-C and Full-Frame Sensors 55mm Back Focus M48...

Flattens Field for SkyWatcher EvoGuide 50ED Compatible with Askar 52mm Super ED Guidescope Standard 55mm Backfocus Supports APS (28mm) and Smaller...