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2 new from $20.95

(as of 2013-04-18 02:06:36 PST)

Bobs Knobs Celestron 11″ SCT f/10 Fastar Collimation Knobs C11METFST by Bob's Knobs

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Bob's Knobs

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  • Bob's Knobs are made from black plastic and are 16mm in diameter or 5/8″.
  • The threads are stainless steel.
  • CPC 1100 and EdgeHD models made in 2008 or after have a Trifid Fastar secondary housing and require
  • 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 co


Bobs Knobs Celestron 11″ SCT f/10 Fastar Collimation Knobs with metric threads (CPC or EdgeHD models) C11METFST

Bob's Knobs Celestron 11″ SCT f/10 Collimation Knobs fit Celestron 11″ (28cm) f/10 SCT versions with metric collimation and “Trifid” rotary cover Fastar secondary housing screw threads. As well, these knobs will fit Starizona Hyperstar and C11 versions with metric collimation screws (CPC1100 or EdgeHD models).


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