I have a couple of MF lenses - MF for Manual focus, not the other. They are 24mm f2.8, and 135 f2.8 AI lenses, both 1970's vintage. They are superb lenses, although the 135 has a slight warming tendency. The D600 is amazing with them. I would never have expected the level of automation that is possible with lenses produced that long ago. My D7000 was great, but the D600 is even better.