165826 ⎘
Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void using wholly visual means; Visual exposure meters for determining the exposure time in photographical recording or reproducing based on the comparison of the intensity of measured light with a comparison source or comparison illuminated surface
Sub-classes:Method of acquiring outside luminance using camera sensor and electronic device applying the method
#2Method of acquiring outside luminance using camera sensor and electronic device applying the method
#3Electronic device and operating method of controlling brightness of light source
#4Carbon isotope analysis device and carbon isotope analysis method
#5Spectrum verification imaging system and method