Bob's Knobs Celestron SCT 8” EdgeHD (black oxide)

Bob's Knobs for Celestron SCT 8” EdgeHD:

Precision Collimation at Your Fingertips

• Specialized for Celestron SCT 8" EdgeHD: Exclusively designed for the Celestron 8” (20 cm) f/10 SCT with Fastar secondary and EdgeHD optics.
• Part Information - Part: C8edgBO and C8edgSS:
  • Telescope Compatibility: Perfectly fits Celestron 8" f/10 SCTs marked “EDGEHD OPTICS” on the corrector ring.
  • Knob Variants: Available in black oxide steel (black) or stainless steel (silver), each 12 mm (1/2”) in diameter for ease of use.
  • Thread Material: Choose between black oxide or stainless steel threads for a secure and lasting fit.
• Important Usage Notes:
  • Specific Model Fit: These knobs are only for the EdgeHD Fastar secondary version. Not for use on non-EdgeHD Fastar secondaries due to screw length differences.
  • Thread Length Matching: Ensure the thread length on our knobs matches that of the factory collimation screws.
• Environmental Suitability:
  • Black Oxide Steel Use: Ideal for dry climates; periodic oiling recommended for rust prevention.
  • Stainless Steel Advantage: Offers enhanced corrosion resistance, suitable for coastal, humid areas, or places with frequent condensation.
• Dust Cover Compatibility:
  • Normal Fit with Knobs Installed: The factory dust cover will continue to fit as usual with Bob's Knobs installed.
• Enhanced Telescope Maintenance: Perfect for Celestron SCT 8” EdgeHD telescope owners seeking a simple, tool-free solution for accurate collimation adjustments.