OPTEC-4300 to internal 3-inch clamp to allows tight fit of Paracorr, Wynne Correctors, and other 3-inch optics for the Gemini Focusing Rotator. Adjustable placement of lens inside Gemini drawtube allows ideal spacing of corrector / flattener optics to primary mirror
3-inch internal clamp assembly with OPTEC-4300 dovetail,
9/64” ball driver,
5/64” hex key.
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