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This combination focal reducer and field corrector lens accessory works with all Celestron 5", 6", 8", 9 1/4", 11" and 14" SchmidtーCassegrain telescopes
This clever accessory makes it possible to have a dual focal ratio instrument, without sacrificing image quality
The Reducer/Corrector is f/6.3 for C5, C6, C8, C9? and C11 telescopes and f/7 for the C14 telescope