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См. также в других словарях:

  • Focal length — The focal length of an optical system is a measure of how strongly it converges (focuses) or diverges (diffuses) light. A system with a shorter focal length has greater optical power than one with a long focal length. Thin lens approximation For… …   Wikipedia

  • FOCAL-69 — was the landmark version of the FOCAL programming language, more widely publicized than the original version of the language created in 1968. FOCAL 69, created by Richard Merrill is important because: * It was the basis for all later derivatives… …   Wikipedia

  • Focal-plane shutter — In camera design, a focal plane shutter is a type of photographic shutter that is positioned immediately in front of the focal plane of the camera, that is, right in front of the photographic film or image sensor. AdvantagesOne of the main… …   Wikipedia

  • back focus — Photog. the distance between the back surface of a lens and the focal plane when the lens is focused at infinity. [1895 1900] * * * …   Universalium

  • back focus — noun : the distance from the rear glass surface of a photographic lens to the focal plane when the lens is focused on a very distant object …   Useful english dictionary

  • Flange focal distance — The flange focal distance (FFD) (also known as the flange to film distance, flange focal depth, flange back distance (FBD), or register, depending on the usage and source) of a lens mount for an interchangeable lens camera system is one of its… …   Wikipedia

  • Digital camera back — Kodak DCS420 digital camera, consisting of a modified Nikon N90s body (left) and a digital back (right) shown here separated …   Wikipedia

  • Frédéric Back — (born April 8, 1924) is an award winning Canadian animator.Born in Saarbrücken, Germany, he emigrated to Canada in 1948.In 1952, he joined the graphics department of Radio Canada and has remained there since.He created a massive stained glass… …   Wikipedia

  • vacuum back — noun : a vacuum platen used in the focal plane of a camera to hold the film during exposure …   Useful english dictionary

  • BFL — • Back Focal Length ( > IEEE Standard Dictionary ) • Bakersfield, CA, USA internationale Flughafen Kennung …   Acronyms

  • Lens (optics) — For other uses, see Lens. A lens. Lenses can be used to focus light. A lens is an optical device with perfect or approximate axial symmetry which tra …   Wikipedia

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