DIN: Short for Deutsche Industrie Normen .The German standard specification .DIN paper sizes ,now renamed ISO, have been adopted as the European standard, DIN is used as a film speed system by Germany and some othe rEuropean countries .

• din:是德国工业标准的简称。以前，欧洲的标准纸度是din，现在改为ISO。现在，德国和一些欧洲国家都用din来作菲林的感光速度的单位。