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Bob's Knobs Celestron 11" SCT f/10 Fastar Metric Collimation Knobs

(Only 2 Left)
SKU: BOB-C11METFST
$27.95
 

Bob's Knobs Celestron 11" SCT f/10 Fastar Metric Collimation Knobs

These Bob's Knobs C11 Fastar Metric Collimation Knobs fit Celestron 11” (28 cm) f/10 Schmidt-Cassegrain telescopes (metal or carbon fiber tube) with metric thread factory collimation screws and a "Trifid" rotary cover Fastar secondary housing. These knobs will fit the C11 with EdgeHD optics. They will also fit the C11 with Starizona Hyperstar if the collimation screws have metric threads.

  • Bob's Knobs are made from black plastic and are 13 mm in diameter or 5/8"
  • The threads are stainless steel
  • Numerous Celestron 11" metal tube and carbon fiber tube SCTs made from 2000 to 2005 have the Trifid rotary cover Fastar secondary with black collimation screws that have metric threads which require these knobs. However, a few Fastar C11's have black Phillips screws with standard threads, so take care in choosing your knobs.
  • With Bob's Knobs installed your factory dust cover will fit normally
  • When the knobs are installed, the rotary secondary cover must remain open. No worries though, the cover is cosmetic only and will not affect functionality of the scope