International Organization for Standardization

Photography - Film-based cameras - Automatic controls of exposure - Second Edition
 N 2721

Annotation

This International Standard specifies the exposure at the focal plane of film-based cameras for values of two exposure parameters, i.e. field luminance and film speed, and also describes methods of evaluating other photometric characteristics, such as the acceptance angles of the photoelectric system.

This International Standard applies to automatic exposure control systems which are built into film based cameras or coupled with them to regulate the exposure in the focal plane as a function of the several exposure parameters. The mechanism can control either the focal-plane illuminance or the exposure-time interval or both. Pointer (or needle) matching systems are included in this International Standard even though they are not fully automatic. This standard is not applicable to digital cameras.

Автоматический перевод:

Фотография - Основанные на фильме камеры - Автоматические управления воздействия - Второй Выпуск

Этот Международный стандарт определяет воздействие в фокальной плоскости основанных на фильме камер для значений двух параметров воздействия, т.е. полевую яркость и скорость пленки, и также описывает методы оценки других светоизмерительных характеристик, таких как углы приема фотоэлектрической системы.