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Glossary
L
Latent
image:
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.
Latitude:
The amount of over- or underexposure possible without a significant
loss in the quality of an image.
Leaf
shutter: A camera mechanism
that admits light to expose film by opening and shutting a circle
of overlapping metal leaves.
Lens:
A piece of several pieces of optical glass shaped to focus an image
of a subject.
Lens
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.
Light
meter: See exposure
meter.
Light
tight: Absolutely dark.
Lith
film: A type of film made
primarily for use in graphic arts and printing. It produces an
image with very high contrast.
Local
reduction: See reduction
(3).
Long
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.
Luminance:
The light reflected or produced by a given area of a subject in
a specific direction. Measurable by a reflected-light (luminance)
meter.
Luminance
meter: See reflected-light
meter.
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