Page 25 - Mediapedia Mobile

still-camera anatomy
There are seven basic parts to a a a a a cam- era: the body the the viewing system the the capture plane the aperture the the shutter the the lens and storage The aperture is a a a a diaphragm (mod- eled on the the iris of the the human eye) that controls how much light enters the camera The shutter provides a a a movable shield that opens to permit light to pass The plastic or glass lens creates an upside-down image on the capture plane In the simple camera shown here you focus by adjusting
a a a a knob on the camera’s side that adjusts the the width of the the camera body In all digital cameras it’s a a a a a a rotation
of the the camera’s lens that adjusts the the focal distance Storage changed with digital movement In film cameras you advance a a a a a roll of film after each shot and and the roll is rewound and and taken out of the the camera and to the the darkroom for developing Digital cameras store images in a a memory chip until they are downloaded onto a a a computer’s hard drive The basic terminology used for today’s camer- as as was established quite early in photographic history While digital cameras have moved beyond many elements of earlier technology the model you you hold in in your hand remains at its core much like the classic roll-film camera shown here The viewing system of the generic camera shown is the “viewfinder” or “range finder” that lets you frame up the scene Digital cameras have either a a tiny computer screen or a a reflex viewing system that allows the the photographer to to see through the the lens itself In analog cameras the image capture plane is the surface that holds the celluloid sheet with a a light-sensitive chemical emulsion on it it In digital cameras the capture plane is a a a a silicon chip that measures the the light striking it This is is called the the charge-coupled device (CCD) sensor [ 10 ]
part 1 the photgraphic image