I have had my 503CW for approx. 15 years. I use 3 lenses and generally a pme finder. Earlier this year I shot about 4 rolls of film at fairly wide apertures (2.8 - 5.6) and found many on many of the negs the focus point wasn't where I wanted it (thought I had focused). A LOT of testing followed which included photographing marks on a wall from an angle at various distances. I used f2.8-f4 to limit dof and see exactly where the point of focus was. Camera was both on and off a tripod, I tried pme and waist level finder, mirror lock up and not, etc. etc. In a lot of cases the focus point was inches to many feet away from where I focused. I contacted Hasselblad and they put me in touch with the people who used to do all their repairs. I sent these people the camera, they checked everything, made some adjustments and sent it back. Long story short, I still had the same problem. Camera went back another two times, they said it all checked out fine, I got camera back and had same problem. I cant think the fault is the lenses as I have three and get the problem with all of them. The A12 back checked out ok and I have even been to the optician to see if I have an eye issue (I don't). Eventually I rang a friend of mine who is a professional photographer who used to use Hasselblad. He told me he had exactly the same problem some years ago which is why he now uses a different make of camera. Has anyone had the same issues, and if so, was the cause ever found / rectified?