
$27.95
See if it's really the one
Search with this product to compare it, find similar styles, or turn up something better before deciding.
Bob's Knobs for Astro-Tech AT12RC Secondary: Precision Adjustment Made Simple Broad Compatibility: Designed for Astro-Tech, GSO, iOptron, MallinCam, Orion (US), and TPO 12" f/8 Ritchey-Crétien (RCT) secondary mirrors, accommodating both solid and truss-tube models. Part Information - Part: AT12RC: Telescope Fit: Perfectly tailored for the secondary of 12" f/8 RCT telescopes across multiple brands. Knob Design: Manufactured from black plastic, each knob measures 16 mm (5/8”) in diameter for ease of use and precise control. Thread Durability: Constructed with stainless steel threads for reliable performance and longevity. Convenient Features: Dust Cover Compatibility: Specifically designed to allow the factory dust cover to fit normally even with Bob’s Knobs installed. User-Friendly Installation: Designed for easy installation, offering a hassle-free solution for secondary mirror adjustments. Enhanced Telescope Functionality: Ideal for astronomers who seek to fine-tune their telescope’s performance with simple yet effective accessories.
Have a question about this?
We currently ship within the US, with more countries coming soon.
Final cost and dates are confirmed at checkout.
🇺🇸 Ship from USA · On Agora since 2025
$27.95