I've got a casio exz50 with the housing they make for it - heres a link to some shots I've taken with it - often in very low light and allways freediving.
Casio U/W setup pics
Its about the size of a pack of cigarrettes and, in the housing - about the size of a small SLR. These have very nice Pentax lenses. The darkest pics on the site were taken at around 7:30 pm under heavy overcast with rain with quite cloudy water. They are noted on the site As 'Flock of large Drums..'. It was REALLY dark - no flash obviously. Don't know about movies - haven't tried.
like to try the 7 megapixel version sometime
