英语词汇“f-number”是什么意思，“f-number”的读音、用法及例句翻译-烛光网

词汇	f-number
释义	f-num·ber AHD[ĕfʹnŭm'bər] D.J.[ˈefˌnʌmbə]K.K.[ˈɛfˌnʌmbɚ]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 Etymology语源 f(ocal length) f(ocal length) number number
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