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Bob's Knobs for Orion Secondary Set Screws on XT, SkyView & Others # CNsec30

5.0 (7 Reviews) Read Reviews Write Review
Brand Bob's Knobs
Part Number CNsec30
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 can even do it while looking through the eyepiece on most scopes. These thumbscrews are also much easier to use with gloves on. And perhaps most importantly, you'll never drop that pesky little Allen wrench or screwdriver into the grass again. Installation is a snap with the included instructions, and you can undo the modification at any time.

Part: CNsec30
Fits: Celestron C8-N/NGT, C10-N/NGT, Orion Astrograph, Astroview, SkyQuest XX and XT, Skyview, SkyWatcher, StarBlast, GSO, and many others.

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. 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.

Reviews

5.0 (Based on 7 Reviews) 100% of reviewers recommended this product.
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    1. Guest

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      Review by Richard
      1556249461
      Apr 25, 2019

      5.0 Recommended 100%

      Pros:

      Cons:

      Comments:

      If you don't have these you must get them. Recommended 100% to make your life easier. Why don't you have these already?

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

      This review was provided courtesy of AgenaAstro.com

    2. Guest

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      Review by Laurence B.
      1548604616
      Jan 27, 2019

      5.0 Bob's knobs

      Pros:

      Cons:

      Comments:

      Makes adjusting the secondary a breeze!

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

      This review was provided courtesy of AgenaAstro.com

    3. Guest

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      Review by Jeff H.
      1524235085
      Apr 20, 2018

      5.0 Bobs knobs

      Pros:

      Cons:

      Comments:

      Work very well for secondary mirror adjustment. No more tools needed. Highly recommended. Well worth the price.

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

      This review was provided courtesy of AgenaAstro.com

    4. Guest

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      Review by Michael L.
      1496932556
      Jun 8, 2017

      5.0 Bobs Knobs

      Pros:

      Cons:

      Comments:

      Makes collimation much easier.

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

      This review was provided courtesy of AgenaAstro.com

    5. Guest

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      Review by Itay K.
      1488216449
      Feb 27, 2017

      5.0 Quick to install & easy to use

      Pros:

      Cons:

      Comments:

      Use the Knobs for a 10" skywatcher collapsible secondary mirror - takes less than 1 min to replace the original screws & it makes the collimation process much easier than using the Allen key

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

      This review was provided courtesy of AgenaAstro.com

    6. Guest

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      Review by Starry nights in Big Skies of Northwest Montana.
      1413590400
      Oct 17, 2014

      5.0 Helpful tool

      Pros:

      Easy to Use,Accurate

      Cons:

      Comments:

      I have only owned my 10" XTG since April and collimation with the allen wrench was always a chore. In July , I ordered Bob's Knobs after reading positive reviews. With Bob's knobs I can easily have my telescope perfectly collimated in under 5 minutes. The knobs are easy to install and well made. All telescopes of this type should have Bob's knobs as standard equipment . I would recommend this product to all Newtonian reflector style telescope owners - it will make collimation an easy task.

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

      This review was provided courtesy of AgenaAstro.com

    7. HawaiiAstro

      HawaiiAstro New Member

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      Review by Tiebreaker of Maine.
      1320451200
      Nov 4, 2011

      5.0 What a time saver!

      Pros:

      Easy to Use,Compact

      Cons:

      Comments:

      Sure makes collimating the secondary a snap! The knobs easily replaced the allen head screws that came with the scope. No more worries about dropping that allen wrench!

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

      This review was provided courtesy of AgenaAstro.com

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