photographic reciprocity law

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• reciprocity law — noun : a statement in photography: a constant density is obtained on a photographic material if the product of the intensity of light and the time for which it acts is a constant …   Useful english dictionary

• Reciprocity (photography) — In photography and holography, reciprocity refers to the inverse relationship between the intensity and duration of light that determines exposure of light sensitive material. Within a normal exposure range for film stock, for example, the… …   Wikipedia

• Photographic processing — is the chemical means by which photographic film and paper is treated after photographic exposure to produce a negative or positive image. Photographic processing transforms the latent image into a visible image, makes this permanent and renders… …   Wikipedia

• Photographic Alliance of Great Britain — The Photographic Alliance of Great Britain (known as the PAGB) is the umbrella organisation that provides benefits and co ordinates specific events for the majority of photographic clubs and societies in England, Scotland, Wales Northern… …   Wikipedia

• Photographic filter — Four photographic filters. Clockwise, from top left, an infrared hot mirror filter, a polarising filter, and a UV filter. The larger filter is a polariser for Cokin style filter mounts. In photography and videography, a filter is a camera… …   Wikipedia

• Photographic developer — In the processing of photographic films, plates or papers, the photographic developer (or just developer) is a chemical that makes the latent image on the film or print visible. It does this by reducing the silver halides that have been exposed… …   Wikipedia

• law — 1. A principle or rule. 2. A statement of fact detailing a sequence or relation of phenomena that is invariable under given conditions. SEE ALSO: principle, rule, theorem. [A.S. lagu] Alexander l. states that a jerky nystagmus becomes worse when… …   Medical dictionary

• Photography and the law — A No Photography sign, commonly placed in properties where the owner objects to or it is illegal to take photographs (though in some jurisdictions, this is not a legal requirement). Photography tends to be protected by the law through copyright… …   Wikipedia

• Latent image — A latent image on photographic film is an invisible image produced by the exposure of the film to light. When the film is developed, the area that was exposed darkens and forms a visible image. In the early days of photography, the nature of the… …   Wikipedia

• Science of photography — refers to the use of science, such as chemistry and physics, in all aspects of photography. This applies to the camera, its lenses, physical operation of the camera, electronic camera internals, and the process of developing film in order to take …   Wikipedia

• Velvia — Infobox Photographic film name = Velvia code = RVP maker = Fujifilm speed = 50/18° format = 35mm, 120, 220, 4×5 in, 8×10 in, 13×18 cm, Super 8†, 16mm† †Third party type = s balance = d process = E 6 grain = RMS 9 latitude = ±½ stop saturation =… …   Wikipedia