I have an RB Pro s with 180, 90 and 50mm lenses. I also have a 500c (with a recently jammed shutter) with the 80 Planar. The Hassey is smaller, lighter with older technology. The RB has a much gentler and smoother shutter release, more precise (for me) rack and pinion focusing and a larger negative size. Optically, in real use, the lenses are about equal although I'll give the nod to the Mamiya for sharpness and contrast. One of the nice things about the Mamiya is that you need not keep your finger depressed on the shutter for the longer shutter speeds as in the Hasselblad. True, the Mamiya is a boat anchor but you kinda get used to it. Also, close-ups are a breeze for the RB due to the bellows. Really, it all depends on your shooting style and needs. Regarding mirror slap, the Mamiya feels smoother than the Hassey (although this is very subjective).
Last edited by agfarapid; 04-29-2013 at 10:22 PM. Click to view previous post history.