The Explore Scientific 3in 0.7x Reducer - Corrector reduces the effective focal length of a particular instrument by the factor 0.7x (for f/8) and 0.8x (for f/10) respectively. The reducer/corrector not only reduces the focal length but also operates as a very effective field flattener.
The EdgeHD .7x Focal Reducer Lens makes your EdgeHD 800 one full f-stop faster than f/10, doubling the equivalent exposure at f/10. 4-element lens design. Maintains similar flat-field performance as native EdgeHD optical design
Celestron’s new EdgeHD reducers feature a custom 4-element optical design engineered to maintain the flat-field performance of our award winning EdgeHD optical system. Unlike generic reducers, our premium reducers provide substantial back focus to accommodate an assortment of imaging accessories.
The Takahashi Reducer CR 0.73X is a is compatible with the Mewlon 250 CRS and FSQ-106EDX4 telescopes, providing a focal length reduction of .73X. The reducer produces a 44 mm diameter image circule suitable for medium format cameras and chips.