A spring stop is bent or broken. See the two little springs at 8:00 o'clock on the outside of the top image here. http://members.shaw.ca/hargravep/70-210.htm
Powell At 12:26 PM 08/06/2005 , you wrote: > >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 >
