An image formed by the changes to the silver halide grains in photographic
emulsion on exposure to light. The image is not visible until chemical
development takes place.
The amount of over- or underexposure possible without a significant
loss in the quality of an image.
shutter: A camera mechanism
that admits light to expose film by opening and shutting a circle
of overlapping metal leaves.
A piece of several pieces of optical glass shaped to focus an image
of a subject.
shade: A shield that fits
around a lens that prevents unwanted light from hitting the front
of the lens and causing flare. Also called a lens hood.
meter: See exposure
tight: Absolutely dark.
film: A type of film made
primarily for use in graphic arts and printing. It produces an
image with very high contrast.
reduction: See reduction
lens: A lens whose focal
length is longer than the diagonal measurement of the film with
which it is used. The angle of view with such a lens-film size
combination is narrower at a given distance than the angle that
the human eye sees.
The light reflected or produced by a given area of a subject in
a specific direction. Measurable by a reflected-light (luminance)
meter: See reflected-light