Yeah thats at 1.4, which has an awesomely narrow DOF. Sharpness is good at 1.4, definitely usable, very good when you consider just how small of an area is actually "in focus" at 1.4. At about 2.8 it is razor sharp, very nice lens. A couple more shots at 1.4: Really, not much more you could ask for as far as sharpness from…
I'm sorry I missed this discussion when it was started a decade ago, and I'm sorry that the links above are broken, but I'll add my comments now for the record. I published a paper about pie menus in the proceedings of 1988 ACM SIGCHI conference called “An Empirical Comparison of Pie vs. Linear Menus”, in which we measured…