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  • Bob's Knobs Bob's Knobs Meade 8" Lightbridge Collimation Knobs Primary Screws - MLB8PRI
    $27.95
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  • Bob's Knobs Bob's Knobs Collimation Knobs for Skywatcher 190mm Mak-Newtonian Primary - MN190PRI
    $25.95
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  • Bob's Knobs Bob's Knobs Collimation Knobs for Skywatcher 190mm Mak-Newtonian Secondary - MN190SEC
    $20.95
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  • Bob's Knobs Bob's Knobs SkyWatcher 5" - 10" & C6, C8, and C10; Newtonian Primary Collimation Knobs - SWPRI
    $25.95
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  • Bob's Knobs Bob's Knobs Celestron 6" SCT Collimation Knobs Secondary - Black Oxide - C6BO
    $20.95
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  • Bob's Knobs Bob's Knobs Celestron 11" SCT f/10 Fastar Metric Collimation Knobs - C11METFST
    $20.95
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  • Bob's Knobs Celestron C8 Classic Orange Tube Collimation Knobs
    Bob's Knobs Bob's Knobs Collimation Knobs for Celestron Pre-1980 Orange SCT - C8ORG
    $20.95
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  • Bob's Knobs Celestron C14 Secondary Collimation Knobs - Phillips Screws w/Metric Threads
    Bob's Knobs Bob's Knobs Celestron f/11 C14 Secondary Collimation Knobs - Metric Phillips - C14METPHI
    $20.95
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  • Bob's Knobs Bob's Knobs Collimation Knobs for Orion SkyQuest XT Secondary with 25 mm Screw Length - CNSEC25
    $20.95
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  • Bob's Knobs Celestron 11
    Bob's Knobs Bob's Knobs Celestron 11" SCT f/10 Metric Stainless Steel Knobs - C11METSS
    $25.95
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  • Bob's Knobs Celestron 5
    Bob's Knobs Bob's Knobs Celestron 5" SCT f/6 Knobs - C5F6
    $16.95
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  • Bob's Knobs Celestron 5
    Bob's Knobs Bob's Knobs Celestron 5" SCT Metric Stainless Steal Knobs - C5METSS
    $25.95
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  • Bob's Knobs Celestron 5
    Bob's Knobs Bob's Knobs Celestron 6" SCT f/10 Stainless Steel Knobs - C6SS
    $25.95
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  • Bob's Knobs Celestron 8
    Bob's Knobs Bob's Knobs Celestron 8" EdgeHD Stainless Steel Knobs - C8EDGSS
    $25.95
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  • Bob's Knobs Celestron 8
    Bob's Knobs Bob's Knobs Celestron 8" Hyperstar Stainless Steel Knobs - C8HYPSS
    $25.95
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  • Bob's Knobs Celestron 8
    Bob's Knobs Bob's Knobs Celestron 8" f/10 Metric Stainless Steel Knobs - C8METSS
    $25.95
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  • Bob's Knobs Celestron 9.25
    Bob's Knobs Bob's Knobs Celestron 9.25" SCT f/10 Metric Stainless Steel Knobs - C9.25METSS
    $25.95
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  • Bob's Knobs Meade 14
    Bob's Knobs Bob's Knobs Meade 14" SCT 6-Screw f/8 Knobs - M14-6F8
    $19.95
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  • Bob's Knobs Takahashi Mewlon 180 Secondary Knobs
    Bob's Knobs Bob's Knobs Takahashi Mewlon 180 Secondary Knobs - MEW180
    $20.95
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  • Bob's Knobs Takahashi Mewlon 210 Secondary Knobs - MEW210
    Bob's Knobs Bob's Knobs Takahashi Mewlon 210 Secondary Knobs - MEW210
    $20.95
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  • Bob's Knobs Takahashi Mewlon 300 Secondary Knobs - MEW300
    Bob's Knobs Bob's Knobs Takahashi Mewlon 300 Secondary Knobs - MEW300
    $25.95
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  • Bob's Knobs CGE Pro Allen Bolt Replacement Knobs - CGEPRO
    Bob's Knobs Bob's Knobs CGE Pro Allen Bolt Replacement Knobs - CGEPRO
    $44.95
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  • Bob's Knobs GM-8 & G-11 Tripod Allen Bolt Replacement Knobs - LGTRI
    Bob's Knobs Bob's Knobs GM-8 & G-11 Tripod Allen Bolt Replacement Knobs - LGTRI
    $29.95
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  • Bob's Knobs GM-8 & G-11 Elevation Lock Allen Bolt Replacement Knobs - LGELE
    Bob's Knobs Bob's Knobs GM-8 & G-11 Elevation Lock Allen Bolt Replacement Knobs - LGELE
    $20.95
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  • Bob's Knobs CGE Pro Allen Bolt Replacement Knobs - CGEPRO
    Bob's Knobs Bob's Knobs NexStar Tripod Allen Bolt Replacement Knobs - NTRI
    $34.95
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  • Bob's Knobs Telrad Reflex Finder Stainless Steel Knobs - TELRAD
    Bob's Knobs Bob's Knobs Telrad Reflex Finder Stainless Steel Knobs - TELRAD
    $19.95
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  • Bob's Knobs Meade 12
    Bob's Knobs Bob's Knobs Meade 12" SCT 6-Screw f/8 Knobs - M12-6F8
    $19.95
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Bob’s Knobs understands that telescope collimation can be a struggle for observers new to astronomy, but it is crucial to enjoying your telescope to the fullest. Optics out of alignment, or collimation, yield images with noticeable imperfections. For example, stars will not come to a pinpoint focus and planets will look slightly hazy. The best way to prevent this from happening is to collimate your scope.


To achieve collimation, telescopes often include screws which require a screwdriver to modify the position of the mirrors. Unless you are careful, that screwdriver could scratch your optical tube assembly, or even the optics themselves. Moreover, your OTA’s mirrors are highly sensitive, and it can often be difficult to get such a precise micro-adjustment with a screwdriver.


Collimation is often the most frustrating aspect for beginners, but it doesn’t have to be. Bob’s Knobs makes it easy to collimate your Newtonian or Catadioptric telescope with their collimation thumbscrew sets. There’s no screwdriver, no Allen wrench. Simply install the knobs and you are ready to collimate with the twist of a wrist. Bob’s Knobs work with many Catadioptric and Newtonian telescopes, from makers like Celestron, Meade, Orion, and more! Not sure where to start? The experts at High Point Scientific are ready to help you get the most out of your scope!

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