No not until now. But I see that it only has a 180° diagonal field of view but not horizontal or vertical, something that to my knowedge only circular fisheyes have. I plan to do 360°/180° panoramas where each frame needs to cover 180° vertical.
I use a 10D (and isDs) with 1.6x Crop. You are right this review confirms you: http://www.photozone.de/8Reviews/lenses/peleng_8_35/index.htm I completely overlooked this. Does the Sigma then give me 180° horizontal field of view otherwise it doesn't seem to matter for 360°/180 panos since this guy…