How Does A Camera Work?

A camera is a lightproof box with an opening in it which allows light to pass through to the sensor where the image is recorded. The camera body is the box, the lens is the opening and the shutter is the thing that opens to let the light in. The lens focuses the image on the sensor giving a high-quality recording of the scene the camera is pointing at.

A camera works by exposing the camera sensor to light when the shutter opens. The amount of time the shutter is open, the size of the opening in the camera lens and the sensitivity of the camera sensor to light are all adjustable and set by either the camera or the photographer to create the exposure.