Фотография. Фотоэлектрические экспонометры общего назначения. Руководство по составлению технических условий
Название (англ.):
Photography; General purpose photographic exposure meters (photoelectric type); Guide to product specification
Описание (англ.):
Specified are calibration levels and test conditions for general-purpose photoelectric exposure meters which measure reflected or incident light, or both, in determining photographic exposure for camera use. The specifications apply to exposure meters containing a light-sensitive element, and indicating electrical instrument, a directional system and a calculator to correlate the meter indications with thecamera exposure settings.