Photography — General purpose photographic exposure meters (photoelectric type) — Guide to product specification
NORMA vydána dne 1.8.1974
Označení normy: ISO 2720:1974
Datum vydání normy: 1.8.1974
Počet stran: 7
Přibližná hmotnost: 21 g (0.05 liber)
Země: Mezinárodní technická norma
Kategorie: Technické normy ISO
Description / Abstract: 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 the camera exposure settings.