Benjamin: I did get that it was for M4/3. In my opinion, narrowminded as it might be, I don't think it is cost effective or worth the hassle for the crop factor, cludgy adapter and costly conversion. I think the magic of that 43mm will be lost on fourthirds.
The Mamiya M7/150mm lens is a fine landscape lens but has lousy bokeh for closer range and it is on the slow side, aperture wise.