Dismiss Notice
New Cookie Policy
On May 24, 2018, we published revised versions of our Terms and Rules and Cookie Policy. Your use of AstronomyConnect.com’s services is subject to these revised terms.

More Views

Bob's Knobs for Celestron C6 f/10 Secondary with Metric Collimation Screw Threads # C6

5.0 (4 Reviews) Read Reviews Write Review
Brand Bob's Knobs
Part Number C6
Availability available

Product Info

Manufacturer Description

Collimate your Catadioptric or Newtonian reflector style telescopes without tools!

It's easy....just grab a Bob's Knob collimation thumbscrew and turn. You cane ven do it while looking through the eyepiece on most scopes. These thumbscrews are also much easier to use with gloves on. And perhaps the most importantly, you'll never drop that pesky little Allen wrench or screwdriver into the grass agin. Installation is a snap with the included intructions an you can undo the modifications any time.

Part: C6
Fits: Celestron 6" (15 cm) f/10 SCT versions (C6 Evolution, C6-A-XLT, C6-GT, C6-S, C6-SE, C6-SGT, others)

Knobs: Black oxide steel, 12 mm (1/2") diameter
Threads: Black oxide steel

Notes:

  1. The factor dust cover will fit properly with Bob's Knobs installed. However, some very early versions of the design have very little clearance between the factory dust cover and secondary housing. To make room for the knobs, contact us for free set of spacers that attach to the ring around the corrector plate to move the dust cover slightly away from the secondary assembly. These spacers are not needed for most versions of this telescope.
  2. All versions of the Celestron C6 SCT have collimation screws with metric threads.

Reviews

5.0 (Based on 4 Reviews) 100% of reviewers recommended this product.
Write a Review
Rating Distribution
Sort by
  • Date
  • Rating
  • Useful

    1. Guest

      Skill Level
      Unknown
      Time with Product
      Unknown
      User Notes:
      Review by Arion H.
      1549857986
      Feb 10, 2019

      5.0 Simple and effective

      Pros:

      Cons:

      Comments:

      All SCTs should have these... they make colimation much easier without needing to be on the front of the scope. You see the changes immediately as you turn the knob.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    2. Guest

      Skill Level
      Unknown
      Time with Product
      Unknown
      User Notes:
      Review by Michael S.
      1521173899
      Mar 15, 2018

      5.0 Works perfectly

      Pros:

      Cons:

      Comments:

      Easy install and simple to use. Better than to mess around in the dark with a screwdriver.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    3. Guest

      Skill Level
      Unknown
      Time with Product
      Unknown
      User Notes:
      Review by Алексей Т.
      1518404924
      Feb 11, 2018

      5.0 good

      Pros:

      Cons:

      Comments:

      good

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    4. Guest

      Skill Level
      Unknown
      Time with Product
      Unknown
      User Notes:
      Review by WordUpJackson of Fullerton, CA.
      1396137600
      Mar 29, 2014

      5.0 Great product

      Pros:

      Accurate,Easy to Use

      Cons:

      Comments:

      I decided to get some Bob's knobs for my 6SE because collimating an SCT in the dark is a bit scary with a screwdriver. One slip, and you'll end up with a scratch on your corrector.
      Installing them takes just a few minutes, and using them is a snap. My SCT is always performing at it's best, and I don't fear damaging the corrector during collimation.
      I can't find any cons to installing Bob's knobs on any telescope. Great product!

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    Sort by
    • Date
    • Rating
    • Useful