Camera parts are essential components of any camera. Viewfinders, LENSES, irises, APERTURES, and SHUTTERS are all important parts of a camera that work together to create the perfect image. Viewfinders are used to help the photographer frame the shot and compose the image. LENSES are used to focus the light onto the film or digital sensor. Irises control the amount of light that passes through the lens. APERTURES are adjustable openings in the lens that control the amount of light that enters the camera. SHUTTERS are used to control the length of time that the light is allowed to enter the camera. All of these parts work together to create the perfect image.