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: SkyWatcher MN190 Maksutov-Newtonian telescopes.
Knobs: Black plastic, 13 mm (1/2") diameter
Threads: Stainless steel
1. Our secondary knobs are mounted on long screws to clear the deep secondary lip.
2. The small cover over the secondary collimation screws must be removed and set aside when Bob"ªs Knobs are installed. This cover is cosmetic only and does not affect operation of the scope