Bob's Knobs Sky-Watcher 190MN Collimation Knobs
 Choose: Primary Adjustment & Lock KnobsChoose: Secondary Adjustment Knobs (30mm) 

Bob's Knobs Sky-Watcher 190MN Collimation Knobs

£24.00✓ 2 year warranty


In stock shipped 1-2 working days.

About this product

Model:  bk_mn190_pri
Part Number:  MN190pri

Bob's Knobs are the BEST option for tool-free collimation.

Simple to fit and easy to use.

Collimate your telescope without an Allen key or screwdriver! 

Instructions are supplied but can also be found online as well as useful FAQ.

Images are representative and may not show the exact knob size / threads.

IMPORTANT: Please ensure the Bob's knobs threads and factory screw threads match before installation. 

Knobs for SkyWatcher MN190 Mak-Newt Primary

Part: SWMNpri
Fits: SkyWatcher MN190 Maksutov-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
  1. Knobs with shorter screws and spacers replace the factory Phillips collimation screws. Knobs with longer screws replace the factory set-style (grub) locking screws.
  2. 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 now red in color.
  3. Protect the locking knobs from damage, and do not support the OTA using the locking knobs as feet.

Knobs for SkyWatcher MN190 Mak-Newt Secondary

Part: SWMNsec
Fits: SkyWatcher MN190 Maksutov-Newtonian telescopes.

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

  1. Our secondary knobs are mounted on long screws to clear the deep secondary lip.
  2. The small cover over the secondary collimation screws must be removed and set aside when Bob’s Knobs are installed. This cover is cosmetic only and does not affect operation of the scope.

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