['æpəʧə] n This HTML5 player is not supported by your browser
gen. 絞り news1 nf19 (e.g. camera, iris of the eye, shibori) ; 搾り news2 nf25 (e.g. camera, iris of the eye) ; 開き レンズの、 レンズの (hiraki) River and Water Resources Glossary (Infrastructure Development Institute Japan) phys. 口径 (kōkei) tech. 孔 (こう) ; 穴 (ana) ; 穴口 (あなぐち) ; 穴径 (あな・けい) gen. アパーチャ (apācha) ; アパーチュア ; アパーチャー ; 開口部 (かいこうぶ) ; 口径 news1 nf23 (kōkei) ; 穴隙 ; 開度 (kaido) comp. 開き口 gen. 開度 (kaido) Geological Terms Dictionary (Bruce Bain and Leslie Oberman) ; 開囗 Geological Terms Dictionary (Bruce Bain and Leslie Oberman) ; 開口 (e.g. camera, kaikō) Geological Terms Dictionary (Bruce Bain and Leslie Oberman) ; 殻口 Geological Terms Dictionary (Bruce Bain and Leslie Oberman) gen. 空隙 (kūgeki) ; 穴だらけ gen. 開口 news1 nf20 (e.g. camera, kaikō) gen. 窓付き antenn. 開口面 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.
