Bob's Knobs Celestron 11" SCT f/10 Metric Collimation Knobs - Black Oxide
Bob's Knobs Celestron 11" SCT f/10 Collimation Knobs
Black Oxide Steel
Bob's Knobs Celestron 11" SCT f/10 Collimation Knobs fit Celestron 11" (28 cm) f/10 SCT versions with metric collimation and flat secondary housing collimation screw threads (CPC 1100, EdgeHD, and metric Fastar).
- Bob's Knobs are made from black, oxide steel and are 12 mm in diameter or 1/2"
- The threads are black, oxide steel
- With Bob's Knobs installed your factory dust cover will fit normally
- Some black Phillips screws have standard threads but most black Phillips factory collimation screws usually have metric threads
- There may be a small plastic cover over the factory collimation screw on some telescope versions. This cover will need to be removed and set aside with the installation of Bob's Knobs. No worries though, the cover is cosmetic only and will not affect functionality of the scope
