well i must be even smarter then because in fact - it's razor wire
Matt, don't let the canon only lens snobs ruin your new toy joy. I had the Sigma 10-20 for a couple of years. It is a great lens, and the coating looked as good the day I sold as the day I bought it. Enjoy it!
But no, it's no good on a 5D, which is why I don't have it anymore.
im not a canon only lens snob - ive got the bigma...
and kenko stuff too...
Vignetting?
not exactly - it makes a small photo in the middle of the frame with the whole rest of the photo remaining black


its wicked 



