ISO 4238
Cinematography; Optical printing ratios for enlargement and reduction of motion-picture film images; Specifications
Kinematografie - Kopierfenster für optische Vergrößerung und Verkleinerung von Bildfilmen - Faktoren für den Abbildungsmaßstab
Responsible national committee
NA 149-00-03 AA - Production, playback and preservation of motion picture and sound
Responsible international committee
ISO/TC 36/WG 2 - Laboratory and distribution services technology