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| 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) |
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| 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 |
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| 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) |
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| gen. |
空隙 (kūgeki); 穴だらけ |
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| gen. |
開口 news1 nf20 (e.g. camera, kaikō) |
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| gen. |
窓付き |
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| antenn. |
開口面 |
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| English thesaurus |
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| 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. |
