Knobs for 10” Newtonian telescopes manufactured by Guan Shen Optical (GSO), including Meade LIghtbridge, Hardin Optical, and Zhumell.

Article number: BKMLB10pri
Availability: On backorder
Delivery time: Ships in 2-3 Days from our Warehouse

Part: MLB10pri
Fits: Meade Lightbridge and GSO 10” (25 cm) f/5 telescopes.

Primary collimation

  • Knobs: Black plastic, 30 mm (1-1/4”) diameter, 5-point fluted
  • Threads: Plated steel

Primary Lock

  • Knobs: Black plastic, 25 mm (1”) diameter, knurled
  • Threads: Stainless steel


  1. If your primary looks different from our photograph, or already has factory collimation knobs, these knobs will not fit.
  2. The telescope optical tube assembly will clear the rocker box with primary knobs installed.
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