I have a weird question. I am having problems getting sharp pics using my Zeiss and D3 at distances beyond say 10 feet or so. I am shooting at F2 and I know the DOF is very thin. I have a pretty steady hand and have lots of portraits of the kids shot with the Zeiss / D3 combo. At distance it seems the camera is back focusing. How could it be in good close focus manually, but bad focus manually at distance? Here is one... from about 5 feet away or so. F2 An example at distance... This is a crop about 66.7%. Focus was on the big R in Waverunner. It looks like the focus was on the W to me. All shots at distance seem similar to this one. F2. The autofocus seems fine as well... here is one I shot today with the 24-70 at 2.8.