Have you looked at the Sigma 50m 1.4? I don't know too much about it but it looks pretty cool.
I have not been very lucky with Sigma's, after the 30 1.4
I am rather wary
17-40 + Ext tubes, 40mm, f/9....
Michael--I really like the DoF and man, those colors pop!
Nice colors, the 17 40 has special colors, used to love it :)
On the Sigma, the 30 had problems focusing on any thing beyond 5m, landscapes even stopped down to f8 were blurry
Michael damn! You are the pop master! :p
Thanks guys, here's the same shot with less DOF, f/5...
I still love experimenting with DOF; one of the best thing about dSLR's.
Nick - I really like that second one; great shadows.