Why does the image in my Nikon D90 viewfinder shake when I turn the camera on or autofocus?
Asked 9/25/2012
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2 answers
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On my Nikon D90, the viewfinder image visibly shakes or taps when I power the camera on or when autofocus engages. I first suspected the mirror, but I turned VR off and also tried another lens, so I’m trying to confirm whether this is more likely a camera-body problem or a lens/mount issue. What should I check?
Originally by Photography Stack Exchange contributor. Source · Licensed CC BY-SA 4.0
Photography Stack Exchange contributor
14y ago
2 Answers
4
Edit: The more I think about this, the less convinced I am that what I wrote originally is the answer, especially if this is happening with other lenses. I didn't see the same failure mode, either; mine just quit focusing. I'm going to query the OP about a couple of things in the comments and will revise this answer if I come up with anything else.
Original Answer:
Based on the OP's comment:
The first-generation 18-200 had problems with the AF hardware failing, so it might be that yours is on its way out. Mine died pretty early in its life and Nikon fixed it under warranty.
There were also a few cases where the front element fell out of the lens because the retainer ring wasn't properly secured, so you might want to check that, too.
Originally by user6508. Source · Licensed CC BY-SA 4.0
user6508
14y ago
0
Generated from our catalog & community — verify before relying on it.
It’s unlikely to be the mirror. On a DSLR like the D90, the mirror is essentially either up or down, so a repeated shaking/tapping viewfinder image points more toward the lens or lens mount than the mirror mechanism.
From the answers, the most likely causes are:
- a lens VR fault
- mechanical play in the lens mount, possibly where the mount is loosening from the lens/body
- less likely, a lens autofocus hardware issue
Even if VR is switched off, a lens fault can still be involved. A good next check is to mount the lens on a different camera, or try another known-good lens on your D90, and compare. Also gently check whether the mounted lens has any noticeable wobble or play at the mount.
If the shake follows one lens, the lens is the likely culprit. If it happens with multiple lenses on the D90, the body mount or body-side AF drive may need service.
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