Aperture problems are rare on the 3.6's -- no oil to speak of, that sort
of thing. Check carefully around the lens mount, especially near the
DOF button, for any sign of impact that might have bent the mount or the
lever itself. Anything else would be a stab in the dark -- worn parts
relating to the DOF button perhaps. That's something one of us would
have to look at. Fortunately removing the mount is easy as cake....
Johnny Johnson wrote:
>
> Hi John, Clint or anyone else with input to my problem -
>
> I received a 35-70, f3.6 lens in the mail today. The glass is in great
> shape and the body shows light use with no apparent abuse but the lens does
> have a depth of field preview problem. When I took it out of the shipping
> box the DOF button was stuck in the depressed position and, as I turned the
> aperture ring, the blades would stop down. I mounted it on a camera body
> and it still acted the same way. I removed it from the body and worked the
> diaphragm lever on the rear of the lens mount a few times. It was a little
> stiff at first but it freed up. Now the diaphragm doesn't open/close when I
> turn the aperture ring but the DOF preview button is out (the normal
> position) but strongly resists being pushed in. I mounted it back on the
> body and the lens seems to work properly other than the DOF preview button
> being stuck.
>
> So, I was wondering - before I contact the seller- is this something I
> might have a chance of correcting myself or would it need to be looked at
> by a professional? If a pro fixes it what would be the approximate charge?
>
> Thanks for any advice that is forthcoming.
>
> Johnny
>
> __________________________
> Johnny Johnson
> Lilburn, GA
> mailto:jjohnso4@xxxxxxxxxxxx
>
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