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: Takahashi Mewlon 210 versions
Knobs: Black plastic, 13 mm (1/2") diameter
Threads: Stainless steel
1. The factory dust cover will fit normally with the knobs in place.
2. Knobs include a set of long spacers so they clear the secondary housing lip.