Attached shows the coverage of the Samyang on a full frame body. You can kinda see the image circle it gives which you can expand into if you cut off the hood. There are some examples out on the internet of people who have cut off the hood.
The latest Samyang fisheye has a removable hood.
Thanks for the info. I didn't realise they had updated the design since I got mine early on. That makes it a bit more interesting for full frame use, even if it doesn't cover the whole sensor.
Canon 1D, 300D IR, 450D full spectrum, 600D, 5D2, 7D, 7D2, EF 35/2, 85/1.8, 135/2+SF, 70-300L, 100-400L
EF-S 10-18, 15-85, MP-E 65, Zeiss 50/2 macro, Sigma 50A, 150 macro, 120-300/2.8 OS, Samyang 8mm fisheye