Collimate your Catadioptric or Newtonian reflector style telescopes without tools!
It's easy....just grab a Bob's Knob collimation thumbscrew and turn. You cane ven do it while looking through the eyepiece on most scopes. These thumbscrews are also much easier to use with gloves on. And perhaps the most importantly, you'll never drop that pesky little Allen wrench or screwdriver into the grass agin. Installation is a snap with the included intructions an you can undo the modifications any time.
Fits: Celestron 6" (15 cm) f/10 SCT versions (C6 Evolution, C6-A-XLT, C6-GT, C6-S, C6-SE, C6-SGT, others)
Knobs: Black oxide steel, 12 mm (1/2") diameter
Threads: Black oxide steel
- The factor dust cover will fit properly with Bob's Knobs installed. However, some very early versions of the design have very little clearance between the factory dust cover and secondary housing. To make room for the knobs, contact us for free set of spacers that attach to the ring around the corrector plate to move the dust cover slightly away from the secondary assembly. These spacers are not needed for most versions of this telescope.
- All versions of the Celestron C6 SCT have collimation screws with metric threads.
Feb 10, 2019
Simple and effectivePros: Cons: Comments:
All SCTs should have these... they make colimation much easier without needing to be on the front of the scope. You see the changes immediately as you turn the knob.
This review was provided courtesy of AgenaAstro.comMar 29, 2014
Accurate,Easy to UseCons: Comments:
I decided to get some Bob's knobs for my 6SE because collimating an SCT in the dark is a bit scary with a screwdriver. One slip, and you'll end up with a scratch on your corrector.
Installing them takes just a few minutes, and using them is a snap. My SCT is always performing at it's best, and I don't fear damaging the corrector during collimation.
I can't find any cons to installing Bob's knobs on any telescope. Great product!
This review was provided courtesy of AgenaAstro.comSort by