Digging further into the technics behind DSLR filming...
So there happens to be a Native ISO for each type of camera. This particular ISO settings gives the best images with the least noice. It also determines you ISO stops. I found out that the best ISO stops for a Canon are 160, 320, 640, 1250, and 2500 - avoiding 125, 250, 500, and 100.
Does anybody know the best ISO stops for the Panasonic GH3?