Your pictures look very sharp- especially the hand held one at f/2.8. I have the Sigma 10- 20mm f/4- f/5.6 and like it but would someday like a bit faster wide angle for my D80. Are your other shots coming out nice and sharp too? That lens seems to be hard to find in the US right now and does not cost that much more than the Sigma did. Certainly not when compared to other alternatives.