Originally Posted by Chan Tran
In your case get the 50mm f/2 AIS. It's would be nicest to use on the FE2. The series E is just as good but not nice or well built. The AF lens isn't very nice to manual focus.
What Chan said ^. I have two of the 50/2 Nikkor H lenses, the ancestor of the Ais. Mine are great lenses, and yours will have better coating.