About this product
Part Number: AT10RC
Replacement collimation knobs for iOptron / Astro-Tech / GSO / Orion / TPO 10" RC Series telescopes.
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 iOptron / Astro-Tech / GSO / Orion / TPO 10" f/8 Ritchey-Crétien SecondaryPart:
Astro-Tech, GPO, Orion (US), and TPO 10" f/8 RCT secondary (solid or truss-tube)Knobs:
Black plastic, 16 mm (5/8”) diameterThreads:
- The factory dust cover may contact the knobs when installed, but the cover will remain in place. If desired, a shower cap can be used as a substitute cover.
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