I just bought a Hasselblad 500cm... and i must admit, I'm having a few problems understanding how to use it. It's the Planar 80mm lens which i think is causing me the most confusion. No matter what i have set the shutter speed to (what i believe is the shutter speed anyway), it seems to fire only in bulb mode. I don't get it. I've had a look on google but can't find anything relevant (even the 500cm manual doesn't explain the lenses functions). It's prob something simple, but has anyone got any ideas what i'm doing wrong? *EDIT* On further inspection, I've noticed that the shutter in the lens, works independently from the other shutter at the back of the camera (which operates directly in accordance with how long the shutter is actually depressed for). Is this normal? Is this a feature of the 500cm I need to get used to then? I imagine it could cause a few exposure probs if your not used to it.