Just took the plung from DSLR to MF with purchase of 645ZD.
Are all Mamiya 645 lens compatible with this camera?
I understand many of them are manual focus but don't want to pick up a used lens that will not fit my new camera.
you can use the m645 lenses (the manual ones), but they only work stopped down. ie, if you want to shoot at f16, you need to focus at a wider aperture then turn the lens to f16 (dark as) before you shoot.
if you shoot wide open most of the time, then this isnt much of a hassle.