ISO and ND

I'm doing a shoot here in the next hour, and I will be shooting with a 100b. What is the ISO for the DVX? I read the DVX book a while ago and I recall it being like 640 to something. It will be shot outside, daylight, with plenty of sun.

Also on the ND filters can someone tell me on the 1/8th and 1/64th, how many stops it will reduce the exposure? I know the 1/8th should tell me, but I don't know how to figure it out. I'm guess about two stops. - Chad
 
Simple answers: DVX is 640 in progressive, 1280 in interlaced.

1/8 = 3 stops, 1/64 = three more stops (a total of 6).
 
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