Nikon parts: This will affect YOU. Please sign.

Started Oct 5, 2012 | Discussions thread
Marianne Oelund Veteran Member • Posts: 7,169
Mechanical rebuilds

fabgo wrote:

Since both you and Marianne mentioned it: what exactly does a "rebuild" entail? Is this to replace worn out parts? What is it that wears out on these cameras, apart from the shutter? And how many pictures can you take before the camera needs this kind of repair?

Aperture control assembly:  Controls the mirror and aperture, and couples power from the re-cock motor, to reset all of the mechanisms after the exposure is taken.

Mirror assembly:  Has delicate bushings which the mirror rotates on.  These can wear enough to make mirror alignment impossible and affect AF.

The above, and the shutter assembly, are generally ready for replacement after about 500,000 frames.  Another important mechanism is the re-cock motor itself, and the linkages which connect it to the aperture control assembly (if separate).  So far, I haven't had to replace one of those, but have heard of another user who did.  My highest-use camera, a D3s, has well over 900,000 frames on the original motor.

It is perhaps worth mentioning that Canon cameras use a modular design which allows all of the mirror-box components to be replaced as a single unit, rather than piece-by-piece.

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