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repairing Nikkor lens (broken 55-200 VR mount)

joe cormier , Jul 04, 2010; 10:11 p.m.

My wife knocked over her tripod with her d-300s on it. The 55-200mm lens broke off from the lens
mount. The camera is ok and different lenses work ok. The 55-200 mounting flange broke off. Its a very thin
piece of plastic approx. 1/16" thick and 1 inch long. Any chance of repairing it, or if it is repairable is it worth
the cost of repair since the lens is only worth $200. Thanks in advance.

Joe

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Steven P , Jul 04, 2010; 11:10 p.m.

The version II 18-55 lens mount is under $20, shipped from Nikon parts dept. and takes about 5 minutes to replace.
I guess I'll find out the cost of the 55-200's mount when I break it. (I don't handle by the lens alone on my D300, as it seems like a problem waiting to happen.)
Nikon is one of the few companies that will sell parts direct to consumers. I've always found them to be quite friendly and knowledgeable.

Peter Hamm , Jul 05, 2010; 08:18 a.m.

Adorama has that lens refurbished for only 150 bucks. I'd probably just buy another one.

http://www.adorama.com/NK55200VRR.html

Shun Cheung , Jul 05, 2010; 09:52 a.m.

The construction of all Nikon lenses with a plastic mount is very poor. The chance is that more than the mount itself is damaged. For example, it is likely that the elements are now misaligned. I would get the entire lens checked. You are very luckly if replacing the mount is all the repair you need.

Nikon USA does not charge for repair estimates. However, should you decline repair, the return shipping charge is like $15. Given the value for this lens, I am not sure it is worthwhile to waste another $15 or $20 on parts and shipping.

I would check the focus ring and zoom ring yourself and make sure that they are not damaged. If they are, it'll make your decision very straight forward.

Michael Kohan , Jul 05, 2010; 12:25 p.m.

These posts make me think about the possibility of replacing a plastic mount with metal. I have an 18-135 that I like very much (as a snap-shot lens on a D70s when visiting family). I would consider putting on a metal mount. Just found Nikon Parts Department, 7AM - 3PM (Pacific) Monday - Friday 310-414-8107.

Shun Cheung , Jul 05, 2010; 12:54 p.m.

It is not a good idea to replace the lens mount yourself, especially if your lens is currently working fine. Any slight mis-alignment so that your lens is tilted to one side by a tiny bit will lead to sharpness issues so that one side or one corner of your images will be unsharp.

The main problem with Nikon lenses with plastic mounts is not necessarily the mount itself. Rather, the overall construction is of lower quality. Replacing the mount with a metal one will not solve most of the problems. In fact, doing so, you may introduce serious problems.

Michael Kohan , Jul 05, 2010; 02:01 p.m.

Got it Shun, I'll pass on the idea.

Michael R. Freeman , Jul 05, 2010; 03:03 p.m.

These posts make me think about the possibility of replacing a plastic mount with metal.

Nikon bayonet mounts are generally unique to each lens, that is they have specific construction details on the reverse side of the mount (related to the stopdown lever mechanics) that can and usually do differ significantly from model to model. So for instance you can't simply swap out the plastic mount of the AF-S 18~135mm and replace it with the metal mount from the AF-S 18~70mm.

As an example, even within the same model there are differences. There are three different versions of the AF-S 18~55mm, and each version of that lens requires a different replacement mount. They are not interchangeable.

Steven P , Jul 05, 2010; 08:00 p.m.

I discussed the metal bayonet replacement with Nikon's parts guy. I was informed that the plastic mount breaks on an impact, possibly to save the internals from complete destruction.
It kind of makes sense as there is little or no metal on the the inside either.

Robert Hooper , Jul 06, 2010; 01:41 a.m.

This lens is not worth repairing. Buy a new lens.


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