photographic aperture

См. также в других словарях:

• 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 lens — A photographic lens (also known as objective lens or photographic objective) is an optical lens or assembly of lenses used in conjunction with a camera body and mechanism to make images of objects either on photographic film or on other media… …   Wikipedia

• Aperture — For other uses, see Aperture (disambiguation). f stops demonstrated on a lens …   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 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 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

• photographic camera — noun equipment for taking photographs (usually consisting of a lightproof box with a lens at one end and light sensitive film at the other) • Syn: ↑camera • Hypernyms: ↑photographic equipment • Hyponyms: ↑box camera, ↑box Kodak, ↑ …   Useful english dictionary

• aperture — noun Etymology: Middle English, from Latin apertura, from apertus, past participle of aperire to open Date: 15th century 1. an opening or open space ; hole 2. a. the opening in a photographic lens that admits the light b …   New Collegiate Dictionary

• aperture — n. 1 an opening; a gap. 2 a space through which light passes in an optical or photographic instrument, esp. a variable space in a camera. Etymology: L apertura (as APERITIF) …   Useful english dictionary

• Numerical aperture — The numerical aperture with respect to a point P depends on the half angle θ of the maximum cone of light that can enter or exit the lens. In optics, the numerical aperture (NA) of an optical system is a dimensionless number that characterizes… …   Wikipedia

• relative aperture — Optics. the ratio of the diameter of a lens, esp. a camera lens, to the focal length; the reciprocal of the f number or focal ratio of the lens. * * * ▪ optics       the measure of the light gathering power of an optical system. It is expressed… …   Universalium