A matte box is a masking device used in photography and cinematography to control the framing of an image, often for widescreen projection. It blocks unwanted light from hitting the lens, helps prevent lens flares, and allows the use of filters or masks to shape the image.
Understanding matte boxes is important for photographers and filmmakers who want precise control over image composition and lighting. They ensure cleaner, professional-quality images, support creative effects, and are essential when working with widescreen formats or complex lighting setups.