sentences:  The split image rangefinder was a good indication of the width of the AF sensor field of view.Major accessories for the ME F included the Pentax Winder ME II autowinder (automatic film advance up to 2 frames per second), Pentax Dial Data ME databack (date stamping on the film), and the Pentax AF 200S (guide number 66/20 (feet/meters) at ASA 100) and AF 280T (guide number 90/28 (feet/meters) at ASA 100) electronic flashes.Although the ME F was a highly electronic camera normally dependent on battery power, it had a backup ability to operate without batteries, though in a very limited fashion