>My trusty A-50/1.7's aperture ring is so sticky it will not go over 
>f8/f11...have anybody seen this before? and what to do or is it time to let 
>a professional fix it?
>Between f1.7 - f8/f11 it seems to be OK.

I had two A50/1.7 and both had poor aperture rings. Clean and relubrication 
didn't work. I believe it was a design flaw associated with some plastic F 
and A lenses (plastic-to-plastic surface).

regards,
Alan Chan


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