JIS B 7095:1997现行
Photographic lenses - Methods for the measurement of the effective aperture, F-number and relative aperture
出版：Japanese Standards Association
专家解读视频
基本信息
标准编号： JIS B 7095:1997
标准类别：Standard
出版单位：Japanese Standards Association
标准页数：23
标准简介
This Japanese Industrial Standard specifies the measuring methods of effective aperture, F-number and relative aperture of photographic lenses.
等同采用的国际标准
ISO 517:1996 - Equivalent
