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Astromania f/6.3 Reducer Corrector for C Series Telescopes
This clever accessory makes it possible to have a dual focal ratio instrument, without sacrificing image quality. Four-element, fully multi-coated optical design with 41mm clear aperture. This combination focal reducer and field corrector lens accessory works with all Celestron 5, 6, 8, 9 1/4, 11 and 14 Schmidt-Cassegrain 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. Dimensions 2.72 x 2.6 x 2.32 inches, Weight 

Price is $88.00
Price: $87.99