Ease Collimation of SCT Scopes with Bob's KnobsPrecise collimation is essential to good performance for any Schmidt-Cassegrain telescope, but using a pointy screwdriver near your corrector plate and moving from one adjustment screw to another is just a little too scary and inconvenient. Enter Bob's Knobs. An inexpensive replacement for the stock screws on your secondary mirror that allows collimation adjustments without tools. Visit Bob's site to order:
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