Know a little bit about film lighting, but can't quite grasp the concept of using light meters to measure light for proper exposure? You can't rely on your video camera to accurately capture what you see, so you need light meters to properly and accurately capture what you have created on set.
Mike from the SubStream's "Film Lab" has some tips about using light meters.
This handy little gadget will tell you how much light is hitting your actor's face, and as a result, you'll know what f-stop to set your camera to. They used it all of time in the olden days.
You can learn more over at thesubstream.