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Bob's Knobs for Celestron 9.25” SCT
A. Knobs for C9.25 f/10 Secondary with Standard Collimation Screw Threads Part: C9.25std Fits: Celestron 9.25” (23.5 cm) f/10 SCT versions with standard collimation screw threads. Not for CPC 925 or C9.2...