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Definitions (81)
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35mm
Film format. It's name referring to the size of the negative produced
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absorption
When light falls on an object some of it is absorbed by the object and is usually converted to heat. The remainder either passes through the object or is reflected from it. The overall proportion of t [..]
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ANGLE OF INCIDENCE
A ray of light falling on a surface forms an angle with an imaginary line drawn at right angles to the surface. The imaginary line is known as the normal and the angle between it and the incident ray [..]
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Angle of Incidence
A ray of light falling on a surface forms an angle with an imaginary line drawn at right angles to the surface. The imaginary line is known as the normal and the angle between it and the incident ray [..]
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Angle of Reflection
A ray of light reflected from a surface forms an angle with an imaginary line drawn at right angles to the surface. The imaginary line is known as the normal and the angle between it and the reflected [..]
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ANGLE OF VIEW
The maximum angle between rays of light passing through the lens from those parts of the subject which will just be included within the picture format. Usually quoted as the angle given by the diagona [..]
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aperture
Hole positioned concentrically with the optical axis of a lens to restrict the area of the lens through which light can pass. Usually adjustable in size, formed by an iris diaphragm. Main purpose is t [..]
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APS
Initials standing for Advanced Photo System. Using a negative of 26mm but storing data along side the photo for developing proposes.
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ARTIFICIAL LIGHT
Illumination other than natural daylight. The main sources of artificial light for photographic use are tungsten lamps, flashbulbs and electronic flash.
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ASA
The American Standards Association rating of film speed (sensitivity of the emulsion to light). The scale is a simple arithmetical progression, double the ASA number indicating twice the film speed. T [..]
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