VIXEN R130S AND R150S NEWTONIAN

We offer knobs for the Vixen R130S and R150S Newtonian primary and secondary. Select the type of knobs for your telescope from the list below.


A. Knobs for Vixen R130S and R150S Newtonian Primary

Part: SWpri
Fits: Vixen R130S and R150S Newtonian telescopes.

Primary collimation
  • Knobs: Black plastic, 16 mm (5/8”) diameter
  • Threads: Stainless steel
Primary Lock
  • Knobs: Red plastic, 16 mm (5/8”) diameter
  • Threads: Stainless steel
Notes:
  1. The telescope optical tube assembly will clear the Dobsonian rocker box with primary knobs installed.
  2. Knobs with shorter screws and spacers replace the factory flathead Phillips collimation screws. Knobs with longer screws replace the factory set-style (grub) locking screws.
  3. Since the factory collimation and locking screws are close together, knobs must be staggered in height. The locking knobs protrude further than the collimation knobs, and they are red in color.
  4. Protect the locking knobs from damage, and do not support the OTA using the locking knobs as feet.

$25.95


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B. Knobs for Vixen R130S and R150S Secondary

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

Notes:
  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.

$20.95

Screw length