We talk quite a bit about how to add and shape light to sculpt the look of your subjects in your photos. However, the absence of light is just as important to shaping it as is the presence, and this great video will introduce you to one of the most important tools for reducing light selectively.
Coming to you from Jay P. Morgan of The Slanted Lens, this helpful video will introduce you to flags. Flags are an essential tool, particularly when you're working with artificial light. At their core, they're a very simple thing: a piece of material or fabric that blocks light. They're especially helpful when you're using modifiers that throw light all over the set and you want to control the spill. They can also be used as negative fill to bring back contrast. For example, if you want to create a high-contrast look on your subject's face, try putting black flags on both sides of their face to deepen the shadows. You can control the amount of the effect simply by changing the flags' proximity: the closer they are, the deeper the contrast will be. Check out the video above for more helpful tips!