Copal

Copal leaf shutters are Japanese manufactured shutters used on many rangefinder and TLR cameras. They are high quality shutters which tend to cost less than Compur shutters.

There are several variations of the shutter. Some use a simple inertia gear set to regulate speed. Other Copal shutters, such as the widely used MX, obtain a wider range of speeds by using a typical escapement, but have the same basic design.