I actually never intended to get a MF digital camera (I just wanted a back to use on my vie camera) but the deal was just too good to end up with a 645DF and a lens. Anyhow I really like the camera and the ability to use old mamiya lenses... plus I have no choice as I'm still waiting for the 4x5 adapter to arrive here in Hong Kong. I went for the DM33 as the sensor size is quite large (I'd prefer size before megapixels).
Originally I figured with the view camera, if I wanted to do some long exposures I could just pop a sheet of film in my view camera.
I find the noise over a few seconds to be a bit annoying and if I begin to use the DF body more, I really don't want to carry another camera around, this kind of limits some of the stuff I like to do.
I've been checking through the specs and it seems that:
All Leaf/Mamiya backs are limited to 32s
Phase One IQ: 1 min (IQ180 2min)
Phase One P45+ 60 min
However I'm sure I read somewhere about several hour shots on the IQ. Could someone enlighten me?