SCT Collimation without Tools: BOB'S KNOBS
It's easy . . . just grab a Bob's Knob and turn. You can even do it while looking through the eyepiece on most scopes. And you'll never drop that pesky little Allen wrench or screwdriver on your corrector plate, or in the grass again. Installation is a snap with included instructions, and you can undo the modification at any time.
In particular, this model:
Fits: All Celestron 6 inch (15 cm) f/10 SCT versions (C6S, C6GT).
Knobs: Black-oxide steel, 12 mm (1/2 inch) diameter.
Threads: Black-oxide steel.
Note 1: Since the inside of the factory dust cover is close to the secondary housing when installed, additional clearance is needed to make room for the knobs. We provide a set of spacers that attach to the ring around the corrector plate to move the dust cover slightly away from the secondary assembly.
Installation instructions are available in English, Spanish, German, Italian and French.