A compound shutter is a type of camera shutter made up of multiple metal leaves arranged symmetrically around the lens barrel. When released, these leaves open and close to control the exposure time, allowing light to reach the film or sensor. Compound shutters are designed for precision, reliability, and consistent exposure across the frame. They are often used in medium and large format cameras, as well as some high-quality compact systems, providing photographers with accurate shutter control for sharp, well-exposed images.