规定了单闪光类型电子闪光设备的光输出、覆盖角、就绪指示、循环时间和闪光次数的测量方法和性能标准，主要用于在相机快门完全或几乎完全打开时关闭控制闪光灯的触点的情况下，为摄影提供照明。

Specified are methods of measurements and standards of performance for light output, angle of coverage, ready indication, recycle time and number of flashes for electronic flash equipment of the single flash type, which is primarily intended to provide illumination for photography with cameras in which the contacts that control the flash are closed when the camera shutter is fully or nearly fully open.