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

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

£29.00✓ 2 year warranty


5x in stock shipped 1-2 working days

About this product

Model:  bk_at12rc_sec
Part Number:  AT12RC

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

Part: AT12RC
Fits: Astro-Tech, GSO, Orion (US), and TPO 12" f/8 RCT secondary (solid or truss-tube)

Knobs: Black plastic, 16 mm (5/8”) diameter
Threads: Stainless Steel.
  1. The factory dust cover will fit normally with Bob’s Knobs installed.

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