Bob's Knobs Astro-Tech 12" RC Secondary Collimation Knobs

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About this product

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.

Knobs for Astro-Tech (GSO/Orion/TPO) 12" f/8 Ritchey-Crétien Secondary

1. The factory dust cover will fit normally with Bob’s Knobs installed.

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