Just a pet question of mine, i know video cameras have gain control, but there exposure meters still work in terms of shutter speed and aperture, so is it possible to determie what the iso of a video camera is. i know there are special lightmeters that use an ev reading for video, but nobody has properly explained it for me. i am used to thinking in iso as i started out in still photography. mostly i could read the camera's built in lightmeter but sometimes when i want more control it would be handy to calculate a cameras iso equivalent.