Hi Hasselblad 500cm owners. I recently acquired a 500cm and I have a couple of questions. I hope someone can enlighten me. I developed a roll of film last night. Shots 8,9,10,11 on the roll came out blank. I started shooting on Saturday (shots 1-7). I shot 8-11 yesterday afternoon and 12 last night just to finish the roll. I shot the whole roll sunny 16 and everything was perfectly exposed except shots 8-11 (shot yesterday) - these shots came out pure blank. I could see the image on my WLF and the shutter fired and I wound on. I can't wrap my head around what might have happened. The last shot I took at home just to finish the roll was fine. What could I possibly have done? Is there some setting on the lens or the camera that I have fiddled with (O, T?) that could have caused this? The lens cap and dark slide were in my pocket... My other question is about moving the shutter dial. I know to decouple the aperture and shutter dials. I am fine with doing that or setting the EV ont he lens. I can't move it past B, so I would not be able to select 1, 2, 4, 8 + seconds. I can only go to B and not beyond. Am I missing something here or is that reserved for another system? Is there a definitive instruction guide to using the 500? Many thanks.