Translations:AY Honors/Digital Photography/Answer Key/111/en

Principle of a pinhole camera. Light rays from an object pass through a small hole to form an image.

Cameras work with the light of the visible spectrum. A camera generally consists of some kind of enclosed hollow, with an opening or aperture at one end for light to enter, and a recording or viewing surface for capturing the light at the other end. Most cameras have a lens positioned in front of the camera's opening to gather the incoming light and to focus the image (or part of the image), on the recording surface. The diameter of the aperture is often controlled by a diaphragm mechanism, but some cameras have a fixed-size aperture.