Photography; Camera shutters; Timing

This document establishes technical specifications for shutter timing in motion picture cameras, ensuring consistent exposure intervals across the industry. It defines precise methods for measuring and verifying the duration of shutter openings and closures, which are critical for achieving proper image synchronization and motion quality. The standard addresses various operating modes and provides reference values to guide manufacturers and technicians in designing and testing camera mechanisms. By standardizing these timing parameters, the document supports the reliable interchangeability of equipment and film materials during production and exhibition. It outlines required test procedures and acceptable tolerances to maintain uniformity in visual output. The guidelines focus exclusively on the mechanical and temporal aspects of shutter operation, offering a framework for quality control without prescribing specific camera designs. Adherence to these specifications facilitates smoother integration of camera systems within professional workflows and helps ensure compatibility in global film production environments.