C Series Reducer Field Flattener

This reducer and field flattener is designed specifically for Celestron C Series Schmidt-Cassegrain telescopes, serving the dual purpose of reducing the focal ratio for wider fields of view while correcting edge-of-field distortion for sharper, flatter images across the full frame. It is a practical optical accessory that addresses two common challenges in astrophotography with a single unit. Overall, it offers a meaningful upgrade for photographers looking to improve image quality without purchasing an entirely new optical system.

Key Features & Specs

Function	Simultaneously reduces focal length and flattens the field for improved edge-to-edge sharpness
Compatibility	Designed for Celestron C Series Schmidt-Cassegrain telescopes including C8, C9.25, C11, and C14
Reduction Factor	Applies a minus correction to reduce focal ratio, resulting in faster imaging and wider field coverage
Use Case	Suitable for both astrophotography and visual observation, reducing vignetting and star distortion near frame edges
Mounting	Threads directly onto the rear cell of compatible C Series telescopes for a secure, aligned fit
Construction	Multi-element optical design with anti-reflective coatings to minimize light loss and internal reflections
Camera Compatibility	Works with both DSLR and dedicated astronomy cameras using standard T-thread adapters

Best for: Amateur and intermediate astrophotographers using Celestron C Series telescopes who want sharper wide-field images and faster exposure times without upgrading their primary optics.