Same as 137MD except: addition of manual shutter speed settings. TTL flash metering, aperture priority and manual metering modes, LED meter display, AE exposure compensation, AE lock, dedicated hot shoe, PC sync terminal. Quartz timed electronic shutter. Shutter speed range 1 sec to 1/1000 plus B in Manual mode, 11 sec to 1/1000 in AE mode, X sync at 1/60, self timer. ISO range 12 - 3200. Auto film advance (3 fps), manual rewind. Removeable back, DOF preview, electronic cable release. Backs: Data Back D-5. Recommended flash: 540, TLA 20, TLA 30. Film supply indicator. Clutch disengagement system for smooth rewind.