Bob's Knobs

Sort by:
Bob's Knobs Orion(US) Argonaut 150
Bobs Knobs

Bob's Knobs Orion(US) Argonaut 150

$22.95
Bob's Knobs for Orion (US) Argonaut 150 and Intes 6” Maksutov-Cassegrain Secondary: Precision Control for Your Telescope Elevate Your Stargazing: Enhance your Intes 6” Maksutov-Cassegrain telescope's performance with Bob's Knobs,...
Quick view Pre-order
Bob's Knobs Orion(US) Astrograph
Bobs Knobs

Bob's Knobs Orion(US) Astrograph

$22.95
Bob's Knobs for Orion (US) Astrograph and Mass-Produced Newtonian Telescopes: Simplifying Secondary Mirror Adjustments Unlock Precision Control: Elevate your stargazing experience with Bob's Knobs, compatible with Celestron, GSO, Hardin Optical,...
Quick view Pre-order
Bob's Knobs Orion(US) Secondary set screw (very common)
Bobs Knobs

Bob's Knobs Orion(US) Secondary set screw (very common)

$22.95
Quick view Pre-order
Bob's Knobs Orion(US) XT secondary Phillips
Bobs Knobs

Bob's Knobs Orion(US) XT secondary Phillips

$22.95
Bob's Knobs for Orion (US) Astrograph and Mass-Produced Newtonian Telescopes: Simplifying Secondary Mirror Adjustments Unlock Precision Control: Elevate your stargazing experience with Bob's Knobs, compatible with Celestron, GSO, Hardin Optical, Meade,...
Quick view Pre-order