Give your Orion refractor telescope a smooth dual-speed focus adjustment upgrade!. Crayford-style focuser provides smooth roller bearing motion without image shift or backlash. 11:1 fine focus ratio allows minute focus adjustments to provide crisp, detailed views. Precision drop-in replacement for standard focusers on many Orion refractor telescopes. Accepts both 2″ and 1.25″ eyepieces, diagonals, and telescope accessories
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