I recently tested the Metz 54 MZ-4i flash with a SCA 3952 adapter to see if it was possible to shoot full TTL on the Phase 645 / Mamiya body. I was a bit apprehensive if it would work, but it worked great! I shot with the flash head straight at the subject and bounced off of the white ceiling and both exposures were dead on. I was not able to test it on all of our MF bodies because that would require specific SCA adapter for each brand. Here is a quick list of the specific SCA adapter for the most common MF bodies: Phase One 645/ Mamiya = SCA 3952 / H1,H2&H3=SCA 3902 / 500ELX, 503CX, 553ELX=SCA 390 / Contax=SCA 3802
