|
Glossary
T
Tacking
iron:
A small, electrically heated tool used to melt the adhesive in dry-mount
tissue, attaching it partially to the back of the print and to the
mounting surface. This keeps the print in place during the mounting
procedure.
Tank:
A container for developer or other processing chemicals into which
film is placed for development.
Telephoto
effect: A change in perspective
caused by using a long focal length lens very far from all parts
of a scene. Objects appear closer together than they really are.
Telephoto
lens: Loosely, any lens
of very long focal length. Specifically, one constructed so that
its effective focal length is longer than its actual size. See
also long lens.
Tenting:
A way to light a highly reflective object. The object is surrounded
with large sheets of paper or translucent material lighted so that
the object reflects them and not the lamps, camera, and other items
in the studio.
Thin:
Describes a negative or an area of a negative where relatively little
silver has been deposited. A thin negative transmits a large amount
of light. Opposite: dense.
Time:
A shutter setting marked T at which the shutter remains open until
reclosed by the photographer.
Tintype:
A collodion wet-plate process in which the emulsion was coated onto
a dark metal plate. It produced a positive image.
TLR:
See twin-lens reflex.
Tone:
1.) To change the color of a print by immersing it in a chemical
solution. 2.) The lightness or darkness of a particular area.
A highlight is a light tone; a shadow is a dark tone.
Transparency:
An image on a transparent base, such as film or glass, that is viewed
by transmitted light. See slide
(1).
Tripod:
A three-legged support for a camera. Usually the height is adjustable
and the top or head is movable.
Tungsten
film: Color film balanced
to produce accurate color renditions when the light source that
illuminates the scene has a color temperature of about 3200K, as
do many tungsten lamps. Sometimes called Type
B film. See also Type A film.
Tv:
Abbreviation of time value. Used on some camera information displays
as a shortened way to refer to shutter speed settings.
Twin-lens
reflex: A camera in which
tow lenses are mounted above one another. The bottom (taking) lens
forms an image on the exposed film. The top (viewing) lens forms
and image that reflects upward onto a ground-glass viewing screen.
Abbreviated TLR.
Type
A film: Color film balanced
to produce accurate color renditions when the light source that
illuminates the scene has a color temperature of about 3400K, as
does a photoflood. See also tungsten
film.
Type
B film: See tungsten
film.
S |
U
|
|
