The 8 ½" Polaroid Snoot Diffuser is designed to limit the light coming from your flash unit to a relatively small area of your picture and provide a more pleasing and even exposure. It"s used to highlight an object: examples include, a person"s face, a flag, a product, a flower, use it as a hair light for portraits and many others. Shaped as a snoot, it will concentrate the light output from the flash into a much tighter beam, producing a dramatic cinematic lighting effect.