A traditional camera functions by manipulating light much the same way a human eye does. When someone looks at an object, light essentially bounces off that object. The light goes into a person’s eye, and a picture is sent to the retina. A camera functions the same way–light from an object goes in through the aperture. The aperture is a small hole located on or in front of the lens cover. It can get bigger or smaller depending on how much light you want to get in. The light hits the camera lens, which then allows a person to focus the image created from that light onto a piece of film located inside the camera body. When you “click,” a button on a traditional camera, the image created from the light getting in, is essentially locked onto the film inside. You use a film advance lever to get a blank piece of film to lock another image onto it.