Additive System of Photographic Exposure

The APEX System (English: Additive System for Photographic Exposure) is a mathematical model presented under the standards ASA PH2.5-1960, ASA PH2.12-1961 and ANSI PH3.49-1971 Method for calculating exposure settings in photography on the basis of logarithmic basis values. The objective is the calculation of exposure parameters using simple addition equations.

: Light value, Film sensitivity, Aperture, Aperture range, Exposure time Edit source text Weblinks Edit sourcetext

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