Bob's Knobs GSO/StellaLyra 6" and 8" Classic Cassegrain

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About this product

Replacement collimation knobs for GSO/StellaLyra 6" and 8" Classic Cassegrains

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.

Part: GSO6CC

Fits: Astro-Tech, GPO, Orion (US), StellaLyra 6" AND 8" Classic Cassegrain
Knobs: Black plastic, 16 mm (5/8”) diameter
Threads: Stainless Steel.

IMPORTANT: Please ensure the Bob's knobs threads and factory screw threads match before installation.

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