I saw some comments by people about color shifts between frames, especially when at the fringes of the image circle for the lens. Interesting idea but I am not so sure I would use it that much, and I agree that the EOS price is high. I would probably get an adapter for my Fuji and try it out. You can get different lens mounts, looks like it uses a Graflex type mount for the adapters. This is something I would like to rent to try it out first I think. Although with Amazon they have a pretty liberal return policy.
Alan