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. And 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.
Bob's Knobs for Vixen VMC200L Catadioptric Secondary
Note1: Bob's Knobs sit very close to the secondary housing so the factory dust cover should fit fine. However, if the knobs contact the secondary housing before the screws reach the secondary mirror, the manufacturer can supply knobs with longer screws at no charge. If the knobs interfere with the dust cover a shower cap can be used as a substitute cover.
Bob's Knobs Product Number: VMC200SEC
- Additional Information
SKU BS-VMC200SEC Manufacturer Bob's Knobs Barrel Size Knob-Style Collimation Knobs For... Vixen Telescopes For What Telescopes? Cassegrains Warranty Lifetime Warranty
- Included Items
- Set of 3 Bob's Knobs for Vixen VMC200L
- Questions & Answers
Product QuestionsHow do I safely remove the Vixen logo sticker/ cover that hides the secondary mirror's collimation screws so that I can replace the stock screws with Bob's Knobs' screws?Question by: Avi on Apr 29, 2016 5:16:00 PMYou will need to very carefully use a box cutter or razor blade. The logo is on a plastic pies with an adhesive backing. Tilt the scope slightly downward when you do this so that the piece does not hit the primary mirror when it comes loose.Answer by: Chris Hendren (Admin) on Apr 29, 2016 5:51:00 PMAfter replacing the stock collimation screws with those of Bob's Knobs the dust cover no longer fits. The Bob's Knobs screws protrude out too far even after tightening them to where they feel solid against the secondary mirror cell. What can be done?Question by: Avi on Apr 30, 2016 3:54:00 PMUnfortunately, Vixen never designed the cover for aftermarket collimation screws to be used, and so they do not have a different cover available for this scope. Depending on the diameter of the tube, you may be able to use another manufacturer's cover, but the length of the bottom dovetail may prevent this. Please contact us with the tube diameter measurement if you have questions.Answer by: Chris Hendren (Admin) on May 4, 2016 5:57:00 PM
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