Home > Accessories > Collimation > Bob's Knobs
Model: bk_c8orgPart Number: C8org
Bob's Knobs are the BEST option for tool-free collimation.
Simple to fit and easy to use.
Collimate your telescope without an Allen key or screwdriver!
Instructions are supplied but can also be found online as well as useful FAQ.
Images are representative and may not show the exact knob size / threads.
IMPORTANT: Please ensure the Bob's knobs threads and factory screw threads match before installation.
Part: C8orgFits: Pre-1980 Celestron 8” (20 cm) f/10 SCT with orange optical tube and factory set-style collimation screws. These screws can be either Allen or slotted.Knobs: Black plastic, 13 mm (1/2”) diameterThreads: Black anodised Aluminium alloyNotes:
OK so maybe I found that my scope is post-1980, not pre, and so the knobs were then a bit long but nothing a couple of washers cant fix.So much easier than using an Allen key to colimate as well
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