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Knobs for C8 f/10 Secondary with Hyperstar and Metric Collimation Screw Threads
Part: C8hypBO (black oxide steel); C8hypSS (stainless steel)
Fits: Celestron 8” (20 cm) f/10 SCT with metric collimation screws and Hyperstar option
Knobs: Black oxide steel (black) or stainless steel (silver), 12 mm (1/2”) diameter
Threads: Black oxide or stainless steel
- These knobs are taller than our other metric knobs to compensate for the countersunk factory screws in the Hyperstar secondary.
- Black oxide steel (shown in photo) is for dry environments. Lightly oil the knobs periodically as an anti-corrosion measure. Stainless steel provides better corrosion protection in coastal or high humidity areas, or in places where dew or other condensation is common.
- The factory dust cover will fit normally with Bob's Knobs installed.