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09-17-2012, 09:24 AM   #1
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Problems with 645 FA 45-85

My 645 FA 45-85 just started acting strange. Both the focus and zoom rings seem harder to turn than usual. The zoom ring function is not smooth, there seems to be a catch as it goes through about 50mm. Also the auto-focus seems jammed. When I press the AF button on my 645D you can hear the motor trying to focus the lens, but it either doesn't move at all, or moves part of the way then stops. I don't recall any specific incident where the lens struck anything, but I was carrying the camera with that lens and the lens hood over my shoulder on a recent hike which is about the time this started happening.

I assume I need to send the lens in for repair. Any suggestions as to a location in the US that deals with this kind of problem? I purchased the lens used and it has worked great up till now. Even with the problems mentioned above it still works great optically if I focus correctly.

Thanks for your help.

Jeff

09-17-2012, 11:15 AM   #2
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Do you think that some dirt may have gotten into and underneath the focus ring causing this problem? I remember a recent posting where someone had a similar problem and they were able to get the dirt out by holding it a certain way and putting a piece of paper in there and moving it around.
09-18-2012, 12:13 PM   #3
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Original Poster
I'll try that some more, but it effects both the focus and the zoom ring. The tolerance on the zoom ring seems tighter and I haven't been able to get a piece of paper under it.
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