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aperture ['æpəʧə] n
astr.	apertura f
micr.	apertura f (A small, circular opening inside the lens that can change in diameter to control the amount of light reaching the camera's sensor as a picture is taken. The aperture diameter is expressed in f-stops; the lower the number, the larger the aperture)
médic.	foro m (orificium, ostium); apertura f (orificium, ostium); ostio m (orificium, ostium)
sciences., électr.	apertura del collettore; area di apertura del collettore; superficie di apertura del collettore
aperture of an antenna ['æpəʧə] n
ondes;antenn.	apertura irradiante
aperture ['æpəʧə] adj.
comm.	bocca
comm., électr.	diametro del punto luminoso
constr.	vano
médic.	orifizio (orificium, ostium)
transp., génie m.	diaframma
Anglais glossaire
aperture ['æpəʧə] abbr.
abrév., pétr.	ap; aper
ciném.	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.

aperture : 220 phrases, 32 sujets

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