Collimating knobs for dobsonians

More Information Price $20.95 Weight 1 oz.

Separate sets of six knobs (#BKLB10P for the 10" LightBridge, #BKLB12P for the 12") are available to replace the screws used to collimate the scopes’ primary mirrors that need a flat blade screwdriver to adjust. Purchasing both sets of Bob’s Knobs (separately or in money-saving packages containing both, #BKLB10ST for the 10" and #BKLB12ST for the 12") eliminates the need to carry two different screwdriver types out into the field. Installation of the knobs is a snap with the included instructions, and you can undo the modification at any time.

The screws used in these Bob’s Knobs are made of stainless steel. The knobs on the screws are knurled black plastic, 13mm (1/2") in diameter. The knobs are small enough not to impinge on the scope’s light path, yet large enough to grasp and turn easily, even when wearing gloves in cold weather. The factory dust cover will fit normally with the collimation knobs installed.

Bob’s Knobs recommends that you remove one collimation screw at a time and replace it with a knob, then repeat the exchange one at a time with the remaining two screws.