Bob's Knobs Celestron C11 Standard Fastar Collimation Knobs
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Bob's Knobs Celestron C11 Standard Fastar Collimation Knobs

£20.00
  (1 Review)
✓ 2 year warranty

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2x in stock shipped 1-2 working days
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About this product

Model:  bk_c11_std_fst
Part Number:  C11stdfst

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 C11 f/10 with “Trifid” Fastar Secondary Housing and Standard Collimation Screw Threads

Part: C11stdfst
Fits: Celestron 11” (28 cm) f/10 SCT versions (metal or carbon fiber tube) with standard thread factory collimation screws and "Trifid" rotary cover Fastar secondary housing. Factory collimation screws are silver Phillips. These knobs will also fit the C11 with Starizona Hyperstar if the collimation screws have standard threads.

Knobs: Black plastic, 16 mm (5/8”) diameter
Threads: Black Anodised Aluminium alloy

Notes:
  1. These telescopes can have factory collimation screws with either standard or metric threads. Silver Phillips collimation screws are standard thread. Some black Phillips collimation screws are also standard thread. See our hints for more information. If you discover your knobs have the wrong threads, you may return your knobs for exchange at no additional cost. Alternatively, you can order knobs with both standard and metric thread screws and return the unused set for a full refund.
  2. The factory dust cover will fit normally with Bob’s Knobs installed.
  3. The rotary secondary cover must remain open when the knobs are installed. The cover is cosmetic only and will not affect operation of the telescope.

Customer reviews

Average Rating (1 Review):  
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bobs knobs
08 February 2021  | 

make sure you order the correct knobs for your type of telescope as i did, and follow the instructions.
I was able to collimate my SCT in a few minutes without messing with a screwdriver.
great product

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