Knobs for Vixen R130S and R150S Secondary

Article number: CNsec30-VX
Availability: On backorder
Delivery time: Ships in 2-3 Days from our Warehouse

Part: CNsec30 or CNsec35
Fits: Vixen R130S and R150S Newtonian secondary.

Secondary Characteristics: 4-vane spider, a deeply recessed center screw, and factory headless set (grub) collimation screws. The secondary plate holding the screws is about 20 mm (3/4”) thick. This is a very common Newtonian secondary configuration.

Knobs: Black plastic, 13 mm (1/2”) diameter
Threads: Stainless steel


  1. If your secondary looks different from the factory screw photo, please contact us using the link at the bottom of this page.
  2. We offer knobs with screws having either 30 mm or 35 mm length. Order knobs with a screw length sufficient to allow the knobs to clear the secondary housing. Knobs with 30 mm screws are the most common in this configuration.
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