I have posted this to the d7000 forum and wanted the d600 users to advise me. I have the following manual focus lenses: 1. micro-nikkor 55mm 2. series E 28mm 3. series E 70-210 4. Tamron 90mm macro 5. Vivitar series 1 28-105 6 500 mm f5 reflex Nikkor I have been using these lenses on a Canon 60D using an adaptor ring but wish to upgrade into a Nikon DSLR. I know I cant use these lenses to full capacity unless I go with at least the d7000. I was going to get the d7000 but now see the D600 as an option. So my question is if these lenses would perform any better or worse on the fx or dx format. I like nature photography, landscape, macro, wildlife, probably more geared to landscape. Do any of you think I will need to use a Katz eye focusing screen? Are you satisfied with d600 images using AI manual focus lenses?