I already have three lenses to try with it: 28-300 asph IF, 70-300 non Apo and 70-300 Apo DG.
The 28-300 does not focus.. it's probably too old and Sigma won't guarantee it. Both 70-300s work all right, but step into focus slowly in poor light or at the f/5.6 max aperture. Neither will focus in AF-C, which I knew in advance.
Both the 70-300s appear to slightly back focus, so adjustments might be tried. Since I'm using DFD contrast AF, that seems odd. Once the USB dock for Sigma lenses is here, I can try to bring these lenses to a higher level of functionality. Or not.
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