The Copal #1 Shutter is a high performance, durable and large size shutter designed for the professional photographer. Charging the shutter, opening or closing the shutter blades, changing the shutter speeds, changing the aperture stop can be manipulated in any order without the least ill effect on the shutter mechanism.
Copal lens shutters for medium and large format cameras were developed exclusively for the professional market and intended for use with high quality inner and outer lenses. They are able to fulfill all the conditions demanded by every kind of art, industrial and scientific photography. Includes rear retaining rings.