Bob's Knobs Orion(US) Astrograph

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, Orion, Synta, Zhumell, and more. Achieve accurate secondary mirror adjustments effortlessly.
• Part Details - Part: CNsec30 or CNsec35:
  • Versatile Compatibility: These black plastic knobs are tailored for telescopes with a set screw secondary configuration, including Celestron C8-N/NGT, C10-N/NGT, Orion Astrograph, Astroview, SkyQuest XX and XT, Skyview, SkyWatcher, StarBlast, GSO, and others.
  • 13 mm Diameter: Featuring a 13 mm (1/2”) diameter, these knobs provide a comfortable grip for precise control over your telescope's secondary mirror adjustments.
  • Stainless Steel Threads: Crafted with stainless steel threads, these knobs ensure durability and longevity, making them an ideal choice for your telescope.
  • Screw Length Options: Choose between 30 mm or 35 mm screw lengths to accommodate your telescope's unique secondary housing. Most configurations utilize knobs with 30 mm screws.
• Secondary Mirror Characteristics: Recognize telescopes with a 4-vane spider, a deeply recessed center screw, and factory headless set (grub) collimation screws. The secondary plate holding the screws is approximately 20 mm (3/4”) thick, a common Newtonian secondary configuration.
• Complete Set: The listed price includes a full set of knobs, offering you a comprehensive solution for enhancing the precision of your telescope's secondary adjustments.
• Note: Refer to the provided photographs and descriptions to determine the compatibility of these knobs with your telescope's secondary mirror configuration. Upgrade your stargazing setup with Bob's Knobs for unparalleled control.