This was made in several sizes to fit lenses between 30 and 128 mm diameter. Its main uses were for studio or telephotography work. Also available to fit behind the lens. The Dallmeyer catalogue states that on its instantaneous setting exposures are between 1/5 - 1/20 depending on cable release pressure. On bulb the range is 1/5 - 5s.

Similar to the earlier Luc shutter.