ISO/DIS 517现行
Photography - Apertures And Related Properties Pertaining To Photographic Lenses - Designations And Measurements
出版：International Organization for Standardization
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基本信息
标准编号： ISO/DIS 517
发布时间：2007/12/10 0:00:00
标准类别：Draft
出版单位：International Organization for Standardization
标准页数：8
标准简介
Specifies aperture markings for all types of lenses used in still cameras, and gives tolerances for the stop numbers. It also defines aperture stop, entrance pupil, focal length, relative aperture and stop numbers, and gives methods for their measurement or determination.
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