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| apertures f | |||
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| trou du collimateur; trou du diaphragme | |||
| bouche f; fente buccal; ouverture buccale; ouverture des cloisons méridiennes | |||
| encoche f; logement m; mortaise f | |||
| jour m; percée f | |||
| ouverture f (In photography, the diameter of the aperture expressed in terms of the focal length of the camera lens. The greater the f-number, the less light reaches the film and the more in focus the objects in the foreground and the background will be. For example, with an f-number = 16 the objects in the far background will be in focus. Whereas, with an f-number = 2 the background will be blurry (while foreground objects are in focus)); ouverture f (In photography, the diameter of the aperture expressed in terms of the focal length of the camera lens. The greater the f-number, the less light reaches the film and the more in focus the objects in the foreground and the background will be. For example, with an f-number = 16 the objects in the far background will be in focus. Whereas, with an f-number = 2 the background will be blurry (while foreground objects are in focus)) | |||
| pore f | |||
| ouverture aperture | |||
| aperture f | |||
| ouverture f | |||
| 英语 词库 | |||
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| 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. | |||
| ap; aper | |||
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apertures : 217 短语, 41 学科 |
| 一般 | 2 |
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| 信息技术 | 12 |
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| 医疗器械 | 6 |
| 医疗的 | 12 |
| 古生物学 | 22 |
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| 天文学 | 2 |
| 天线和波导 | 11 |
| 射击运动 | 1 |
| 市政规划 | 1 |
| 建造 | 14 |
| 微软 | 1 |
| 技术 | 9 |
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| 文化学习 | 1 |
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| 核物理 | 4 |
| 核辐射 | 3 |
| 法律 | 4 |
| 渔业（渔业） | 2 |
| 照明（电影院除外） | 1 |
| 爱好和消遣 | 3 |
| 生命科学 | 1 |
| 电子产品 | 29 |
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| 联合国 | 5 |
| 自动化设备 | 1 |
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| 航空 | 1 |
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| 计算 | 3 |
| 运输 | 3 |
| 通讯 | 20 |
| 遥感 | 6 |
| 音韵学 | 1 |
| 高能物理 | 2 |