Alstar F/6.3 Reducer & Field Corrector for Schmidt-Cassegrain Telescopes Focal Reducer, Faster Exposure Times, Wider of View, Deep-Sky Observe&Astroimaging, Works with C Series Telescope
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Converts f/10 optical system to faster f/6.3 for a significantly wider field of view Reducer shortens the effective focal length of Schmidt Cassegrain telescope optical system by 37 percent This combination focal reducer and field corrector lens accessory works with all Celestron 5 inch; 6 inch; 8 inch; 9 1/4 inch; 11 inch and 14 inch Schmidt Cassegrain telescopes Four element; fully multi coated optical design with 41 mm clear aperture This clever accessory makes it possible to have a dual focal ratio instrument; without sacrificing image quality
Description
(1)
Converts f/10 optical system to faster f/6.3 for a significantly wider field of view Reducer shortens the effective focal length of Schmidt Cassegrain telescope optical system by 37 percent This combination focal reducer and field corrector lens accessory works with all Celestron 5 inch; 6 inch; 8 inch; 9 1/4 inch; 11 inch and 14 inch Schmidt Cassegrain telescopes Four element; fully multi coated optical design with 41 mm clear aperture This clever accessory makes it possible to have a dual focal ratio instrument; without sacrificing image quality
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