We offer knobs for the Celestron Starhopper 12” primary and secondary, along with stronger springs to support the primary mirror. Select the type of knobs/springs for your telescope from the list below.
A. Knobs for Celestron Starhopper 12” f/5 Primary
Fits: Celestron Starhopper 12” (30 cm) f/5 Newtonian telescopes with open base (pictured)
- Knobs: Black plastic, 30 mm (1-1/4”) diameter, 5-point fluted
- Threads: Plated steel
- Knobs: Black plastic, 25 mm (1”) diameter, knurled
- Threads: Stainless steel
- The telescope optical tube assembly will clear the rocker box with primary knobs installed.
B. Springs for Celestron Starhopper 12” f/5 Primary
Fits: Celestron Starhopper 12” (30 cm) f/5 Newtonian telescopes
Primary mirror springs as supplied by the factory can sag from the weight of the mirror cell. Our stainless steel replacement springs are stronger and provide adequate support to maintain primary mirror collimation. We recommend that the mirror locking screws remain in place for additional control.
C. Knobs for Celestron Starhopper 12” f/5 Secondary
Fits: Celestron Starhopper (6”, 8”, 10”, 12”) Newtonian telescopes
Knobs: Black plastic, 13 mm (1/2”) diameter
Threads: Stainless steel