autofocus lens

См. также в других словарях:

• autofocus — /aw toh foh keuhs/, adj. 1. having the ability to focus automatically: an autofocus lens; an autofocus camera. n. 2. such an ability. Also, auto focus. [1955 60; AUTO 3 + FOCUS] * * * …   Universalium

• Lens speed — refers to the maximum aperture diameter, or minimum f number, of a photographic lens. A lens with a larger maximum aperture (that is, a smaller minimum f number) is a fast lens because it delivers more light intensity (illuminance) to the focal… …   Wikipedia

• autofocus — [ôt΄ō fō′kəs, ät΄ō fō′kəs] n. a device that focuses a lens, camera, etc. automatically: also written auto focus or auto focus …   English World dictionary

• Autofocus — For the film of the same name, see Auto Focus. An autofocus (or AF) optical system uses a sensor, a control system and a motor to focus fully automatic or on a manually selected point or area. An electronic rangefinder has a display instead of… …   Wikipedia

• Autofocus à mesure de contraste — L autofocus à mesure de contraste est un autofocus passif TTL (through the lens) qui fonctionne par «tâtonnement». Il a besoin de moins d espace que les autofocus actifs et est en général plus précis. L AF à mesure de contraste équipe… …   Wikipédia en Français

• Autofocus — L autofocus (ou AF) est une fonction qui permet la mise au point automatique de certains systèmes optiques comme les appareils photo, leur permettant de régler la netteté du sujet. Autofocus est le terme anglais pour désigner la mise au point… …   Wikipédia en Français

• Autofocus à détection de phase — L autofocus à détection de phase (ou AF à contraste de phase) est un autofocus passif dont la particularité vient de son système télémétrique qui «découpe» en deux hémisphères l objectif. L analyse des rayons issus de ces deux hémisphères… …   Wikipédia en Français

• autofocus — au•to•fo•cus [[t]ˈɔ toʊˌfoʊ kəs[/t]] adj. 1) pht having the ability to focus automatically: an autofocus camera[/ex] 2) pht the ability of a camera or lens to focus automatically • Etymology: 1955–60 …   From formal English to slang

• History of the single-lens reflex camera — The history of the single lens reflex camera predates the invention of photography in 1826/27 by one and a half centuries with the use of a reflex mirror in a camera obscura first described in 1676. Such SLR devices were popular as drawing aids… …   Wikipedia

• Canon EF lens mount — The EF lens mount allows all the Canon EF lenses to be used on any of the Canon EOS line of cameras made by Canon Inc.Unlike the EF s breech lock predecessor, the FD mount, the EF mount uses a bayonet style mount. EF stands for Electro Focus :… …   Wikipedia

• Canon EF 50mm lens — The EF 50mm lenses are a group of normal prime lenses made by Canon Inc. that share the same focal length.These lenses have an EF type mount, that fits the Canon EOS line of cameras.When used on a digital EOS body with a field of view… …   Wikipedia