A matte box is a black hood that fits over the front of a camera lens (see figure 7-1). The matte box prevents unwanted light from entering the lens by keeping the actual optics of the camera within its shadow. This prevents unintended overexposure of the film and minimizes artifacts commonly known as lens flares. It’s very rare to work on any professional exterior shoot where a matte box isn’t being used.
A common filming problem known as lens flare can be prevented ...