German standards system that expressed a film speed rating by a number followed by a degree symbol ( ° ). DIN derives its name from the initials of the Deutsche Industrie Normen or Deutsche Industries Norm. The DIN system has been replaced by the more universal ISO system.Photo Tips
Deutche Industrie Norm(Film speed rating defined by the Deutscher Normenausschuss (German standards organisation).).Numeric rating used to describe emulsion speed for German Made photosensitive materials.Just as the same as ASA and ISO numbers.
German-based film speed rating used in Europe before ISO became the norm. A three DIN increase doubles the films light sensitivity.
The German system (Deutsche industrie normal) for rating film sensitivity. Every 3 degrees doubles the film speed. See: EI/ASA; and ISO.