I have two Sunpak heads, one ring flash p/n 651-063 and one standard head p/n 651-060. I really have no idea what I want to do with these. I would like to use them if I had the rest of the parts if for nothing else than just to play. I think I just need a cable from the hot shoe or sync port and a power unit of some kind. Is this correct? Will this work with either a Canon 1N or a Mamiya 645AF? I would really like to use the ring flash on the 645.