Every camera is different. An FX1 is about 160, an XL2 is about 200, a CineAlta is about 320, a DVX is about 640. And it changes depending on what part of the exposure curve you're in... at low light levels the DVX responds at about 320, in intense light levels the DVX responds at about 800-1000. Using ISO/ASA is a very imprecise thing to do with a video camera, as the exposure curve is not linear, but in effect somewhat of a bell curve.
