I have an A series lens where the aperture ring functions as it should when not in the A position - rotates normally and is stopped from going into A position unless you push in the button. However, when you push in the button and move it to the A position, it won't lock in that position. The camera recognizes the A position, but it could easily be moved off.
I'm wondering if anyone knows exactly what the problem and fix is for this? Thanks, Bruce

