Which contact on the rear of the 28mm disables it on tha H1/2? Perhaps Mr. Grover knows? It's/will be MY camera and MY lens, I KNOW it's going to have distortion/vignetting issues, it's MFD is what I need, no the 35mm with dioopter/ext tube WILL NOT cut it, no the Mamiya doesn't have a leaf shutter. So, how do I get this thing to fire? Thanks, I'm sure some secret exists that will treat my ulcer caused by this matter, thank you Hasselblad.