Nice!! How do you like the Sigma 1.4 vs the Canon 1.4. I have the Canon 1.4. I really need a 5D.
In my opinion, nothing compares to a properly calibrated Sigma 50 save for maybe the 50L. The wide-open performance of this lens is amazing. I have had 2 copies of the Canon 50mm f/1.4 before, but to be honest neither copy even came close to the Sigma.
Below is an unsharpened 100% crop one of the images above.
Consider 3 things:
1) The image was taken at f/1.4
2) The subject's face is near the edge of the frame
3) The image was shot with a full-frame camera
With that in mind, I think you'll agree that the performance of this lens is simply astounding.