It is actually a downgrade from its most direct predecessor, the FG, lacking the FG's program auto exposure mode. It uses the same vertical-travel metal focal-plane shutter as the FG,  with electronically timed speeds from 1 to 1/1000 second as well as bulb and a mechanically timed 1/90-second speed.
This model is actually a step backward from its most direct predecessor, the FG, which did not have the program auto exposure feature. It shares the same shutter mechanism with the FG and offers electronically timed speeds from 1 to 1/1000 second, as well as bulb and mechanically timed 1/90-second speed.