Yesterday I was given a Nikon FG, a pleasant little SLR from the early '80s with program, aperture priority, and manual modes. It seemed okay electrically and mechanically at first glance, but I've noticed a minor problem that I hope someone can tell me how to fix. The AI follower on the camera body doesn't move very far. If I turn the lens down to f/22 and then open it up, the follower stops at about f/11 or f/8. I can push it farther by hand, but it won't go farther by itself. The net effect of this is that the camera is usable in program mode (where the lens is always left at its smallest aperture) but not in the other modes where you would actually turn the aperture ring. Well, it wouldn't work below about f/8, at least. I've tried exercising the follower by hand (I once fixed a Minolta XK this way), but it doesn't seem to be doing any good. Does anyone have any other suggestions about what to do to fix it?