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D7K auto focus issue

andyboy1

US
4 posts

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andyboy1 Registered since 12th Oct 2010
Mon 05-Sep-11 01:24 PM

I've been having intermittant focusing issues with my D7K since it arrived last year but could never quite isolate the issue...until this moring. When I have the camera and lens set to auto focus it will work fine for numerous shots then suddenly it will stop auto focusing and i have to revert to manual. Just a suddenly it will return to auto focus. I began to think it was a contrast issue until this morning.

I was doing so shooting and after five shots of the same scene with just a little shifting and composition changes in my distance the camera auto focus stopped working and there was only the small square focus point box in the center of the viewfinder. I shifted the camera to see if a change in scene and contrast would bring back the auto focus...but there was no change.

This time I turned the camer off, dismounted the lens, then remounted it. Set up the same scene and of course the auto focus worked fine.

This most recent incident was with a new 16-85 but it has happened with other new and older lenses. It's easy to jump to the conclusion that it's a lens/contact issue but if that was the case why would it be so intermittant? This can happen several times a day....or not at all.

I'm really reluctant to send the cam back to Nikon right now because it's my peak shoot season and the warranty is good until December.

Any thoughts? Am I on the right tract with the lens/camara contact theory? Anyone else have this happen and resolve it witout sending the cam back to Nikon?

Thanks

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