variable focal length

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• focal length — F/A/V abbreviated as FL, it is the distance, in millimeters, between the center of a lens and the point where the image comes into focus. The value given to a lens, stated in inches or millimeters. The shorter the focal length, the wider the… …   Audio and video glossary

• motion-picture technology — Introduction       the means for the production and showing of motion pictures. It includes not only the motion picture camera and projector but also such technologies as those involved in recording sound, in editing both picture and sound, in… …   Universalium

• Prime lens — In film and photography, a prime lens is either a photographic lens whose focal length is fixed, as opposed to a zoom lens, or it is the primary lens in a combination lens system.Confusion can sometimes result due to the two meanings of the term… …   Wikipedia

• Schneider Kreuznach — is the abbreviated name of the company Jos. Schneider Optische Werke GmbH, which is sometimes also simply referred to as Schneider. They are a manufacturer of industrial and photographic optics.The company was founded on 18 January 1913 by Joseph …   Wikipedia

• Machine vision glossary — Common definitions related to the machine vision field.Compiled for application on the Society of Manufacturing Engineers interest area.General related fields *Machine vision *Computer vision *Image processing *Signal processing NOTOC 0 9*1394.… …   Wikipedia

• Shot (filmmaking) — In film, a shot is a continuous strip of motion picture film, created of a series of frames, that runs for an uninterrupted period of time. Shots are generally filmed with a single camera and can be of any duration. A shot in production, defined… …   Wikipedia

• Photography — is the art, science and practice of creating durable images by recording light or other electromagnetic radiation, either electronically by means of an image sensor or chemically by means of a light sensitive material such as photographic… …   Wikipedia

• motion picture — motion picture, adj. 1. a sequence of consecutive pictures of objects photographed in motion by a specially designed camera (motion picture camera) and thrown on a screen by a projector (motion picture projector) in such rapid succession as to… …   Universalium

• 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

• zoom lens — noun a camera lens that magnifies the image • Syn: ↑telephoto lens • Hypernyms: ↑camera lens, ↑optical lens * * * noun : a camera lens in which the focal length and the image size can be varied continuously so that the image remains in focus at… …   Useful english dictionary

• Varifocal lens — A varifocal lens is a camera lens with variable focal length in which focus changes as focal length (and magnification) changes, as compared to parfocal ( true ) zoom lens, which remains in focus as the lens zooms (focal length and magnification… …   Wikipedia