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Professional photography
Professional photography is the occupation of taking pictures and selling them freelance or as part of a contract usually with a publication.
Industry: Photography
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Professional photography
Selenium cell
Photography; Professional photography
Light sensitive cell used in many types of exposure meters. It generates electricity in direct proportion to the amount of light falling upon its surface.
Additive synthesis
Photography; Professional photography
Method of producing full-color images by mixing light of the three primary colour wavelengths, blue, green and red.
Petzval lens
Photography; Professional photography
Early lens system developed by Joseph Petzval. It had a very wide aperture and was relatively free from aberration. Many modern lenses have developed from this simple three-element design.
Surface development
Photography; Professional photography
Development process in which the image forms primarily on the surface of the emulsion and then penetrates deeper.
Candle metre second
Photography; Professional photography
Unit of illumination related to exposure time, more often referred to as one lux-second.
Film plane
Photography; Professional photography
Plane at the back of the camera across which the film lies.
Supplementary lenses
Photography; Professional photography
Additional lens elements used with the standard camera lens to provide a new focal length.
