I was curious if my AF 50mm f1.8 will work on my Nikon FG-20? I'm aware that it won't auto-focus, but it should work, correct? I just want to know before I go and blow two rolls of film. I tried using my DX lenses on the FG and I think it was stopping the mirror from flipping up and causing some issues. Most of the negatives were either completely blank or had a little corner of exposure.