
Photographic lenses - F-number marking
出版:Japanese Standards Association

专家解读视频
基本信息
标准编号: JIS B 7106:1997
标准类别:Standard
出版单位:Japanese Standards Association
标准页数:7
标准简介
This Japanese Industrial Standard specifies the f-number marking indicated on the photographic lens and its tolerance.
等同采用的国际标准
ISO 517:1996 - Equivalent