Copal No 0. Shutter
✎ Edit this pageThe Copal No. 0 shutter is a precision leaf shutter mechanism widely used in large format and medium format photography. This compact mechanical shutter unit features a 26.3mm diameter aperture opening and provides accurate timing from 1 second to 1/500s, plus bulb and time settings. The Copal No. 0 became an industry standard due to its reliable spring-driven mechanism, easy lens mounting, and compatibility with numerous camera systems and lenses from manufacturers like Schneider, Rodenstock, and Nikkor. Its robust construction and field-repairable design made it particularly popular among view camera users and professional photographers requiring dependable exposure control in demanding conditions.