: The DSLR's exposure time was set to 2 seconds and within that time the Copal : shutter operated for 1/4 second. To see the camera with attached Copal shutter : follow this link: http://people.rit.edu/andpph/a-pix/leaf-shutter-dslr-7891A.jpg : nice :) : Now I am trying to think of other applications for a DSLR avec leaf shutter up : front. Suggestions? ;) flash sync at any speed :)