Can someone please explain to me the differences between these three lenses that go with the Fed3 film cameras? From what I've read, the L/D and the L/Z are macro lenses. Will you need an adapter to fit the L/D and L/Z lenses to a Fed3 camera? Is one superior in quality over another? I currently have the regular Industar 61 lens on my Fed3, and I'm looking into upgrades. Are there any other compatible lens upgrades to the Fed3 film cameras, by Fed or others? Thanks in advance!