I have a non-cpu lens with manual aperture control (I use the aperture ring to set it, and it stays that way when I shoot). My D7000 used to work fine with this lens in A mode - all images were exposed correctly. Manual lens settings were 58mm, f/2, and the camera used to always show f/2 as the aperture setting in mode A.
Recently it started behaving strangely: the camera thinks that the aperture is always set to 16 (with the same manual lens settings), even though it's impossible to set the aperture for non-cpu lenses to non-default value, and it overexposes all images. If I try to change the maximum aperture to 16 in manual lens settings, then it thinks that the aperture is always 90. Help, anyone? Is my camera broken?
Upd: I have no idea what I did (I just removed the lens and put back on several times), but now it's stuck at 11