Have you ever been shooting with your big boy lights and wished you could shoot with your aperture wide open, but your lights are too bright to allow this? You, my friend, need a Neutral Density Filter. In this video, Mark Wallace breaks down the uses of ND filters and how to use them properly. But reducing the amount of light hitting the camera's sensor, you can keep your lens's aperture wide open without having to use less powerful lights. Watch the video below to learn how you too can use this simple technique as well as take it to the extreme by overpowering the sun at f2.8. Enjoy!