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['æpəʧə] імен. | |
|
| зв’яз., ел. |
tamaño del punto |
| прир.науки, ел. |
superficie de entrada de un colector |
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| астр. |
aperturas f |
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|
| антен. |
apertura radiante de una antena |
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|
| заг. |
abertura |
| крим.пр., юр., міжн. прав. |
mirilla del visor |
| мед. |
apertura; foramen; orificio |
| прир.науки, ел. |
área de apertura del colector |
| трансп., маш. |
diagrama |
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| Англійський тезаурус |
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|
| абрев., нафт. |
ap; aper |
| кіно |
A measure of the width of the opening allowing light to enter a camera. The apparent diameter of a lens viewed from the position of the object against a diffusely illuminated background is called the "effect aperture". The ratio of focal length of a lens to its "effective aperture" for an object located at infinity is called the "relative aperture", or "f/number". Larger apertures allow more light to enter a camera, hence darker scenes can be recorded. Conversely, smaller apertures allow less light to enter, but have the advantage of creating a large depth of field. See also shutter speed. |