What does the camera use to control the amount of light entering the lens?
The shutter is the mechanism by which the camera is used to control the effective exposure time of the photoreceptor. Is an important part of the camera, its structure, form and function is a measure of camera grade is an important factor.
Aperture is a device used to control the light through the lens, into the body of the photosensitive surface of the device, it is usually in the lens. Expression aperture size with f value. For a lens that has been made, it is impossible to change the diameter of the lens at will, but can be achieved by adding a polygon or circle inside the lens, and the variable area of the hole grating to control the amount of light through the lens, this device is called the aperture.
The camera uses the aperture to control the amount of lens light (exposure). The shutter controls the time to enter the lens light (exposure).
