f-number
音标['ef'nʌmbə]
汉语翻译
n. 数, 光圈数
英语解释
名词 f-number:
- the ratio of the focal length to the diameter of a (camera) lens system同义词：focal ratio, f number, stop number, speed
详细解释
f-num.ber
n.（名词）The ratio of the focal length of a lens or lens system to the effective diameter of its aperture.Also called f-stop F值：物镜或物镜系统的焦距与入射光孔直径之比也作 f-stop
来源：f(ocal length) f(ocal length)number number
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