Collimate your Catadioptric or Newtonian reflector style telescopes without tools!
It's easy...just grab a Bob's Knob collimation thumbscrew and turn. You can even do it while looking through the eyepiece on most scopes. These thumbscrews are also much easier to use with gloves on. And perhaps most importantly, you'll never drop that pesky little Allen wrench or screwdriver into the grass again. Installation is a snap with the included instructions, and you can undo the modification at any time.
Fits: Celestron 8" (20 cm) f/10 SCT with Fastar secondary and EdgeHD optics.
Knobs: Black oxide steel, 12 mm (1/2") diameter
Threads: Black oxide steel
1. These knobs will fit only the Celestron 8" SCT with Fastar secondary and EdgeHD optics. These telescopes are marked "EDGEHD OPTICS" on the corrector ring. Do not use these knobs on the non-EdgeHD Fastar secondary; the screws on these knobs are too long. Be sure to check that the thread length on our knobs matches the thread length on the factory collimation screws.
2. The factory dust cover will fit normally with Bob's Knobs installed.
Sep 21, 2012
Collimation Made EasyPros:
Easy to Use,CompactCons: Comments:
Replace the phillips head screws with these knobs. Fingertip collimation with no tools. Easy to use in the dark, with no danger to the corrector plate. These should be standard equipment.
This review was provided courtesy of AgenaAstro.comSort by
Manufacturer Bob's Knobs Additional Information bobs-knobs-c8hyp Prism Type No Eyepiece Focal Length Ships by Next Business Day