Canon EF-M + Mamiya 645/Phase One lens
COMPATIBLE IN THEORY MF MA
The flange focal depth should allow conversion, but...
The only drawback is that the Canon has yet to release a fullframe EOS-M camera. This means in practice that you'll have to take both the crop factor of the medium format - fullframe conversion and the multiplier between the medium format - APS-C which leaves you a significantly decreased angle of view.
Have you found an error, or would you like to share some insight about an item? Feel free to mail it to us, we appreciate your help in improving the site.