Celestron EdgeHD 800 0.7× Reducer

Celestron Reducer Lens 0.7× — EdgeHD 800 (94242)

This dedicated 0.7× reducer makes the EdgeHD 800 one full f-stop faster, from f/10 to f/7, halving the exposure needed for the same brightness and widening the field. Its custom four-element design keeps the flat-field performance of the EdgeHD optics.

Back focus and image circle

The reducer provides 105 mm of optimum back focus, enough for cameras and imaging accessories, and works with existing EdgeHD 800 T-adapters. With this reducer, Celestron states that the optimised image circle is 26.7 mm, which fully covers APS-C sensors and smaller cameras.

Specifications

Manufacturer documentation

Celestron Reducer Lens 0.7× EdgeHD 800 · EdgeHD image-circle note

Compatibility notes

EdgeHD 800 only. Image circle shrinks to 26.7 mm (APS-C), unlike the 42 mm of the 1100/1400 reducers.