in the camera, the lens opening that controls how much light gets through the shutter.

in photography, the amount of light that strikes the film

a scale that indicates the aperture in numbers

in a camera, a scale that indicates the depth of field when the camera is focused on a subject at a particular f-stop

in a camera, a scale that indicates how fast the shutter opens and closes, measured in fractions of a second.

a standard measure of the speed of film.

the fastest shutter speed that can be used with a flash to obtain a properly exposed picture

having the light source behind the subject instead of behind the photographer

transmits electronic images onto a disk for printing from a computer rather than on film

a room having little or no light, in which film can be developed and prints made

a bath that sets a film or print image permanently

a device used to shine light through a negative, magnifying the image onto light-sensitive photographic paper, where the image is focus and imprinted

a series of print strips made at different exposures to determine the most appropriate one for the final print