I got a Nikon F4 in the mail today, woohoo. The thing is a tank, I'm already in love with it. There seems to be an issue, though. When the shutter is fired it doesn't stop the lens down completely. When the lens is set to f22 it only stops down to about Here. If the DoF preview button is pressed, it stops down to f22 as it should, but then it still doesn't quite get there when the shutter is fired. I know its not the lens, either, as the lens works just fine on my F/FM10. I tried another lens and the same thing happened. Any idea whats up here? Should I just try to ship it back and try to get a different camera? Maybe I should've gone with the F3, hm. Thanks a ton!