Bob's Knobs for C8 f/10 Secondary with Hyperstar and Metric Collimation Screw Threads

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Knobs for C8 f/10 Secondary with Hyperstar and Metric Collimation Screw Threads

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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

Notes:

  1. These knobs are taller than our other metric knobs to compensate for the countersunk factory screws in the Hyperstar secondary.
  2. 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.
  3. The factory dust cover will fit normally with Bob's Knobs installed.
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