I picked up a very nice looking AE-1 a while back on a whim because I've never owned a Canon. Came with a breech lock 50mm f/1.8 lens. Battery is new, meter works, DOF preview works, manual mode works as far as aperture is concerned. My problem is with the lens aperture set to "A" I cannot get the aperture to do anything but stay in the f/1.8 position. With the back opened (or closed) and the camera set to a low shutter speed, pointed near an overhead light source, the aperture never changes. When the meter says it should be F/11 it just stays wide open. I've tried moving the aperture ring back and forth through the range before putting it in "A" as I realized that this camera has a memory, but it doesn't help. Any suggestions, or just shoot in manual and be happy?