NAPM IT3.110 : 0已作廢
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
標準編號： NAPM IT3.110 : 0
標準類別：Standard
出版單位：National Association of Photographic Manufacturers, Inc.
標準頁數：0
標準簡介
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.
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