['æpəʧə] n This HTML5 player is not supported by your browser
astr. apertura f comp., MS 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) med. foro m (orificium, ostium) ; apertura f (orificium, ostium) ; ostio m (orificium, ostium) nat.sc., el. apertura del collettore ; area di apertura del collettore ; superficie di apertura del collettore antenn. apertura irradiante commun. bocca commun., el. diametro del punto luminoso construct. vano med. orifizio (orificium, ostium) transp., mech.eng. diaframma English thesaurus abbr., oil ap ; aper cinema 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.
