Question about Nikon 6-18x40 Buckmaster Rifle Scope Matte Bdc 6473

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The adjustable focus knob on my Nikon Buckmaster 6-18x40 with not turn, not at all, it's like it is welded on or something. How do you get it to move? Is there a set screw holding it in place or something?

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Sounds like the scope was done up to tight and its flatend the scope tube a bit try undoing the scope screws a little

Posted on Nov 27, 2010


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How to fix when rotating the fine focus knob until it reach the limit of motion and the coarse focus knob get stuck and can only move in very small range.

Based on the fact its a E600 i would suggest to have a engineer look at it : prices range from £120 dependant on your location if you visit they will be able to help

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1 Answer

Focus knob turns but nothing moves

The Celestron manual for this scope has nothing to say, but on the underside of the focuser assembly, between the 2 focus knobs, you may see 2 screws.
They might be thumbscrews or some other screwhead type. One is the adjustment for the focuser internal clearance, or looseness, and the other is a focus travel lock.
If present, try backing both off 1/2 turn from tightness, and then experiment to see which is which. The focus lock will have no effect until tight, when the focuser will cease moving, as is now. The other screw will gradually remove looseness and rattle from the focuser until it just moves smoothly, with no back and forth loose feeling at the knob.
If neither of these screws is visible you will have to take it to a binocular and telescope shop, where they should not charge much.

May 02, 2012 | Celestron Optics

1 Answer

Hello, I have a celestron c9,25. I adjust a nikon D3100 with T-Ring and Adapter to my telescope. Firstly I focus to moon, using an eyepiece, then I removed the eyepiece and adjusted the Nikon. The...

Because the camera has a different focus point from the eyepiece. TURN the focus knob until the camera comes into focus. OR you can buy a "focus ring" for the eyepiece which attaches to the barrel of the eyepiece and is adjustable-- then focus with the camera FIRST and then insert the eyepiece with the ring on it and lift it UP until the image comes to focus-- then tighten the ring. NOW you can use that eyepiece to roughly focus the camera.

Jun 25, 2011 | Celestron C9.25-CF 2350mm f/10 Aluminum...

1 Answer

Is there anyway i can restraighten my riflescope reticle?

You'll need to contact Nikon. The reticule is fixed inside the tube and should not be moving. If your reticule has shifted then it's a defect.

You can contact Nikon's repair service at 1-800-Nikon US (1-800-645-6687) or check our their website here.

Mar 17, 2011 | Nikon 6456 Buckmaster Rifle Scope...

1 Answer

When i zoom it all the way to 9 it gets blurry.

The rear lens may have to adjusted for focus at this magnification. If you adjust it at this setting it may be better in focus in the lower settings for you.

Jan 08, 2011 | Nikon ® Buckmaster® Rifle Scope - 3-9 x 40...

1 Answer

I just puchased from an individual a 4X12X50 Buckmaster scope and had it installed on a 270WBYMAG. Here is my question the adjustment for the horz and vert knobs how many inches per click. Thanks

You scope adjusts at 4 clicks per inch at 100 yards. Commonly called a quarter graduation. (To answer you question accurately it is 0.25 inches per click)

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1 Answer


Sorry, English only.

Sep 24, 2009 | Nikon Buckmaster 3-9x40 Matte Bdc...

1 Answer

Sighting in my scope

That should be covered in your manual.

If not, give Nikon a call.

Or, repost your question on a Bulletin Borad such as at SWFA, where another user may have the identical scope.

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1 Answer

Will nikon replace scope tube on buckmaster 3x9x40

Call customer service and find out. They should have a toll free number. Email might work as well.

Nov 10, 2008 | Nikon ® Buckmaster® Rifle Scope - 3-9 x 40...

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