Even so, on a cropped Canon that will deliver FFE of 12.8, still not quite the equal of this lens. On a Nikon it will deliver FFE of 12.
I wonder why Canon have never ventured into the EWA (Extreme Wide Angle) field?
I've always suspected that Sigma are chasing Nikon users and not Canon. When ever i've spoke to Sigma reps at trade fairs, they always quote Nikon/Sigma simularities. When I mention that I'm a Canon user, they seem to say "oh...yeah. we do Canon also...."
Looking at their new 85/f1.4, Canon users are already well catered for with 2 superb lenses. But Nikon only has the very antiquated Nikkor 85/1.4, with it's ancient screw drive AF. I suspect that Nikon have seen this opportunity and grabbed it before Nikon get around to plugging their lens live up.