I recently started a photography course at college. I bought a second hand Nikon F55 about a month ago(for quite a good price i might add). However i'm looking to get more lenses for it. My question is simple, a classmate told me that all nikon lenses(for film and digital SLR's) fit on all nikon cameras. Where as other companies(canon, olympus etc) changed the fittings. Is this true? If so does this mean if i buy a Nikon DSLR all the lenses i use on my Nikon F55 will fit the DSLR? i hope this is true because photography is about fifty times more expensive than i imagined. Thanks in advance for any help you can give me.