Basic Photography Course

CHROMAKEY

An electronic special effect that

combines two video sources into a composite
picture, creating the illusion that the two sources are
physically together.

CIRCLE OF ILLUMINATION

The total image area

of a lens, only part of which is actually used in taking
a picture.

CLOSE-UP

A photograph or a motion-picture scene

taken at a very close range that shows intimate detail
and captures and holds audience interest.

COATING, LENS

A thin, transparent coating applied

to the surface of lenses or other optical parts to
reduce reflection.

COINCIDENCE

Agreeing as to position. In a coinci-

dence type of range finder, when the two half
images of a distant object are in exact juxtaposition,
they are said to be "in coincidence."

COLLIMATED

A beam of light is said to be colli-

mated when all of its rays have been made parallel.

See SPECULAR.

COLOR BALANCE

The relationship between the

three images composing a color negative or positive
that provides an accurate (or, more generally, the
most pleasing) reproduction of natural colors. (PIA)

COLOR BARS

A color standard used by the television

industry for the alignment of cameras and videotape
recordings.

COLOR CHART

Target for test photography

composed of pigmented areas having colors of high
saturation, often accompanied by gray scales, and
useful in both color photography and in
black-and-white reproduction of colored objects.
An assembly of chromatic samples illustrating a
scheme of color classification. (PIA)

COLOR COMPENSATING FILTER

A filter used to

change the overall color balance of photographic
results obtained with color film and to compensate
for deficiencies in the quality of the light when
printing color films.

COLOR TEMPERATURE

The temperature to which

a black body radiator must be raised in order that
the light it emits may match a given light source in
color; usually expressed in degrees Kelvin (°K).

COLOR TEMPERATURE METER

An instrument

for estimating the spectral quality of a light source
or the illumination on a scene and expressing the
value in terms of color temperature. (PIA)

COLOR TRANSPARENCY

A positive image in

natural colors on a transparent support intended for

projection or for viewing by transmitted light. (PIA)

COLORBLIND

Applied to photographic layers

having only natural silver halide sensitivity to blue,
violet, and ultraviolet rays. (PIA)

COMA

An aberration of a lens that causes oblique

pencils of light rays from an object point to be
imaged as a comet-shaped blur.

COMPONENT

The processing of RGB (red, green,

and blue) channels as three separate channels.

COMPOSITE SIGNAL (Y/C)

(Also called NTSC

signal.) The video signal in which luminance "Y"
(black and white) and chrominance (red, green, and
blue) and sync information are encoded into a single
signal.

CONJUGATE DISTANCE

The distances of object

and image from the lens are called conjugate
distances. For every position that an object may

occupy with respect to a lens, there is a
corresponding position for the image.

CONTACT PRINT

Print produced by exposure in

immediate contact with the original or negative.
These prints are the same size as the original or
negative.

CONTAMINATION

Foreign matter in a processing

solution which impairs its operation.

CONTINUOUS TONE

Photographs in which the

detail and tone values of the subject are reproduced
by an infinite gradation of gray densities between
white and black. (PIA)

CONTRAST, LOW

A term expressing a relationship

of image tones in which highlights and shadows are
represented by very little difference in densities.

CONTRASTY

Photographic term applied to images

showing accentuated highlights and shadows. (PIA)

CONTROL TRACK

The area of the videotape used

for recording the synchronization information (sync
spikes).

COPY

(l) Any document or photograph to be

reproduced. (2) The results of such reproduction.
(3) (Verb) The act of reproducing a document.

COPYBOARD

The board, frame, or other device for

holding copy to be photographed.

CORROSION

The erosion of metals, as by the action

of an acid or an alkali; rusting; oxidation. (PIA)

AI-4

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Basic Photography Course

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DOFMaster for Windows On-line Depth of Field Calculator DOFMaster for Mobile Devices On-line Depth of Field Table Hyperfocal Distance Chart Articles FAQ Recommended Books Support Contact Links Home As an Amazon Associate I earn from qualifying purchases.	contents <- previous page next page -> CHROMAKEY An electronic special effect that combines two video sources into a composite picture, creating the illusion that the two sources are physically together. CIRCLE OF ILLUMINATION The total image area of a lens, only part of which is actually used in taking a picture. CLOSE-UP A photograph or a motion-picture scene taken at a very close range that shows intimate detail and captures and holds audience interest. COATING, LENS A thin, transparent coating applied to the surface of lenses or other optical parts to reduce reflection. COINCIDENCE Agreeing as to position. In a coinci- dence type of range finder, when the two half images of a distant object are in exact juxtaposition, they are said to be "in coincidence." COLLIMATED A beam of light is said to be colli- mated when all of its rays have been made parallel. See SPECULAR. COLOR BALANCE The relationship between the three images composing a color negative or positive that provides an accurate (or, more generally, the most pleasing) reproduction of natural colors. (PIA) COLOR BARS A color standard used by the television industry for the alignment of cameras and videotape recordings. COLOR CHART Target for test photography composed of pigmented areas having colors of high saturation, often accompanied by gray scales, and useful in both color photography and in black-and-white reproduction of colored objects. An assembly of chromatic samples illustrating a scheme of color classification. (PIA) COLOR COMPENSATING FILTER A filter used to change the overall color balance of photographic results obtained with color film and to compensate for deficiencies in the quality of the light when printing color films. COLOR TEMPERATURE The temperature to which a black body radiator must be raised in order that the light it emits may match a given light source in color; usually expressed in degrees Kelvin (°K). COLOR TEMPERATURE METER An instrument for estimating the spectral quality of a light source or the illumination on a scene and expressing the value in terms of color temperature. (PIA) COLOR TRANSPARENCY A positive image in natural colors on a transparent support intended for projection or for viewing by transmitted light. (PIA) COLORBLIND Applied to photographic layers having only natural silver halide sensitivity to blue, violet, and ultraviolet rays. (PIA) COMA An aberration of a lens that causes oblique pencils of light rays from an object point to be imaged as a comet-shaped blur. COMPONENT The processing of RGB (red, green, and blue) channels as three separate channels. COMPOSITE SIGNAL (Y/C) (Also called NTSC signal.) The video signal in which luminance "Y" (black and white) and chrominance (red, green, and blue) and sync information are encoded into a single signal. CONJUGATE DISTANCE The distances of object and image from the lens are called conjugate distances. For every position that an object may occupy with respect to a lens, there is a corresponding position for the image. CONTACT PRINT Print produced by exposure in immediate contact with the original or negative. These prints are the same size as the original or negative. CONTAMINATION Foreign matter in a processing solution which impairs its operation. CONTINUOUS TONE Photographs in which the detail and tone values of the subject are reproduced by an infinite gradation of gray densities between white and black. (PIA) CONTRAST, LOW A term expressing a relationship of image tones in which highlights and shadows are represented by very little difference in densities. CONTRASTY Photographic term applied to images showing accentuated highlights and shadows. (PIA) CONTROL TRACK The area of the videotape used for recording the synchronization information (sync spikes). COPY (l) Any document or photograph to be reproduced. (2) The results of such reproduction. (3) (Verb) The act of reproducing a document. COPYBOARD The board, frame, or other device for holding copy to be photographed. CORROSION The erosion of metals, as by the action of an acid or an alkali; rusting; oxidation. (PIA) AI-4 contents Basic Photography Course <- previous page next page ->	As an Amazon Associate I earn from qualifying purchases.
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