Bob's Knobs Celestron StarHopper secondary

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Bob's Knobs for Celestron StarHopper and More: Streamlined Secondary Collimation Versatile Compatibility: Ideal for Celestron StarHopper, Meade Lightbridge, Orion Astrograph, and m any models from GSO, Hardin Optical, and Zhumell. Part Options - Part: CNsec25 or CNsec35: Telescope Fit: Suitable for a variety of models with similar secondary mirror setups. Secondary Characteristics: Includes a 4-vane spider, a deeply recessed center screw, and factory Phillips collimation screws. The secondary plate is about 20 mm (3/4”) thick. Knob Design: Made from black plastic, each knob is 13 mm (1/2”) in diameter, facilitating easy and precise adjustments. Thread Material: Features durable stainless steel threads for a secure and lasting fit. Selecting the Right Knob: Screw Length Variations: The factory collimation screw length can be either 25 mm or 32-35 mm. Choose knobs with the screw length that matches your telescope. Most Common Size: Knobs with 35 mm screws tend to be more common for these models. Enhanced Telescope Maintenance: Perfect for owners of compatible telescopes seeking a simple, tool-free solution for accurate secondary mirror collimation adjustments. Show more