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.