Maybe I need to fine-tune the >lenses? Not sure how? > >Stash
I had the same experience with the 50mm 1.4 G, and took some test shots that showed rear focus issue. Fort Worth Camera aligned this lens (since then they have done ALL my lenses) and it needed "-15" to alleviate the problem. Very happy with the D600. Suggest you get your lenses aligned. FWIW: the 28-85mm "kit" lens was spot on.