 Starting with the Model D in 1927, most versions could shoot a range of speeds up to 64 frames per second (8-12-16-24-32-48-64 frame/s), although there was a "superspeed" version, the 70-B (1925), designed to run at a single speed of 128 frame/s.This produced an extreme slow-motion effect and was used for motion analysis.The Model 70-E (1935) was a turretless version of the Model D, with a shorter range of speeds (8-16-24-64 frame/s).