DIN system

noun
\¦dēˌīˈen-\

Definition of DIN system 

: a system for determining the speed of photographic materials in terms of the logarithm of the reciprocal of the exposure required to obtain a density of 0.1 above fog density

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History and Etymology for DIN system

DIN from German, abbreviation of Deutsche Industrie-Normen (literally, “German industry standards”), standards for industrial products established by the Deutscher Normenausschuss, a German organization for the establishment and registration of standards in all branches of industry

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