Kowa's medium format system consisting of fast-handling 6x6 film SLR cameras with modular design. Reflecting the innovative skills acquired over decades of practical experience in making sophisticated optical systems for industrial, medical/scientific, video, and motion-picture applications, Kowa engineers created an integrated system consisting of automatic lenses from 19mm to 500mm. A welcome advantage in literally scores of applications was the precision ten-speed Seiko SLV #0 leaf shutter. This reliable, between-the-lens metal shutter offered speeds from 1 to 1/500 second plus "T", with full synchronization for electronic or conventional flash of any kind at any speed.