Field Flatteners & Reducers

Reduces focal ratio by a factor of 0.79x Designed for Medium Format, Full Frame, and APS-C sensors 3-element, 3-group optical design Requires 75.5...

Reduces focal ratio by a factor of 0.79x Provides a flat field for Full Frame, APS-C, and M4/3 sensors 3-element, 3-group optical design Connects ...

Reduces telescope focal ratio to f/5.6 Achieves a 733.6mm final focal length Triplet optical design for field flattening Standard 55mm back focus ...

Reduces Askar 185APO to f/5.6 Resulting Focal Length: 1036mm 4-Element Quadruplet Optical Design Standard 55mm Back Focus Illuminates Full-Frame S...

Maintains Native f/7 Focal Ratio Maintains Native 1295mm Focal Length Triplet Optical Design Standard 55mm Back Focus Includes M68, M54 & M48 ...

Reduces Telescope Focal Ratio to f/5.1 Creates a 566mm Focal Length Imaging System Triplet Optical Design for Field Flattening Provides Standard 5...

Reduction Factor: 0.8x Effective Focal Length (on TV-102): 704mm Effective Focal Ratio (on TV-102): f/6.9 Compatibility: TV-102 and 800-1000mm f...

Focal Length Reduction Factor: 0.8x Optical Design: 4-element, 3-group Telescope Interface: 2.4" Slip-fit Barrel Camera Interface: Threaded for Te...

Corrects Field Curvature for Large Format Sensors Designed for Tele Vue NP101, NP101is, and NP127is Telescopes Fully Illuminates Sensors up to 52m...

Reduction Factor: 0.8x Optical Design: Reducer and Field Flattener Telescope Connection: 2-inch Barrel Camera Connection: M42x0.75 T-Ring Thread O...

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

Designed to fully illuminate APS-C sensor on most APO refractors. The SharpStar 2" field flattener has a M42x0.74 male thread to connect the camera...

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

Corrects field curvature for astrophotography Designed for Baader APO 95/560 Travel Companion Compatible with Zeiss APQ apochromatic refractors Fe...

Genuine Calcium Fluorite (CaF2) Two-Element Cemented Design Corrects for Field Curvature to Produce a Flat Imaging Plane Variable Magnification Fa...

Dramatically widens the field of view of Schmidt-Cassegrain telescopes Engineered to produce a sharp, flat field for visual observation Creates a ...

Reduces focal ratio by a factor of 0.72x Corrects field curvature for full-frame sensors 3-element, 3-group optical design Connects to telescope v...

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...