Hi, I bought a Pro SD body with a Pro S film back. I took the film back off and opened the door - I cannot even move the lever. When I pull the lever the spindle does not spin. I have also pushed that middle clip to the left side as well.
I have a Pro non S back and a Pro SD film and they work ....
I've taken the film back off the camera. Opened it as if I am loading film but that lever doesn't move. When it is on the camera the camera won't fire unless the film back is set to multi exposure.
I wish I could help. I have the Pro SD model, and I know it has a lot of safeguards. If everything is firing and winding with tne other backs, it must be the back.
Thanks for that. I managed to fix it. It must had been in storage for sometime. Using my finger I turned the top right metal spool stud forward and reverse and I heard something clicked. Now all working correctly with/without the camera body. I don't need this film back but it was the same price as the others but this one came with a film back. I will replace the seals in due time .... The Pro SD body is in real nice condition though. 2x RB's together looks very nice...