NAPM IT3.110 : 0已作废
PHOTOGRAPHY - APERTURES AND RELATED PROPERTIES PERTAINING TO PHOTOGRAPHIC LENSES - DESIGNATIONS AND MEASUREMENTS
出版：National Association of Photographic Manufacturers, Inc.
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基本信息
标准编号： NAPM IT3.110 : 0
标准类别：Standard
出版单位：National Association of Photographic Manufacturers, Inc.
标准页数：0
标准简介
Defines related properties of photographic lenses affecting the illuminance at the center of the image. Specifying all types of lenses in still cameras, with tolerances for stop numbers. Includes entrance pupil, relative aperture, focal length, aperture stop, giving methods for determinations and measurements.
本标准替代的旧标准
