Bob's Knobs for Celestron StarHopper and More:

Streamlined Secondary Collimation

Versatile Compatibility: Ideal for Celestron StarHopper, Meade Lightbridge, Orion Astrograph, and many 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.