BS ISO 516:2019 Camera shutters. Timing. General definition and mechanical shutter measurements

Tolerances (measurement)
Exposure time
Performance testing
Mathematical calculations
Synchronization
Time measurement
Test equipment
Photographic equipment
Photography
Marking
Optical measurement
Still-picture cameras
Camera shutters
Cameras

Link: BS ISO 516:2019 Camera shutters. Timing. General definition and mechanical shutter measurements
Source: BSI Standards