英语词汇f-number怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

单词	f-number
释义	f-numbern. Photog. the ratio of the focal length to the effective diameter of a lens (e.g. f5, indicating that the focal length is five times the diameter) 【摄】孔径焦距比， f 值(如 f5 表示焦距是镜头直径的 5 倍)；光圈数 [f (denoting focal length) + NUMBER]
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