Celestron f/6.3 Reducer Corrector for C Series Telescopes
Reducer shortens the effective focal length of Schmidt-Cassegrain telescope optical system by 37% Converts f/10 optical system to faster f/6.3 for a significantly wider field of view Shortens exposure times for astrophotography by 2.5 times Four-element, fully multi-coated optical design with 41mm clear aperture threads into rear cell and works with any brand and size of Schmidt-Cassegrain telescope