To clarify, all cameras with any automation loose all automation when batteries are dead. All the aperture priority cameras of the era would be useless with dead batteries. Some only have a an X-sync speed and B mode available and only a handful have a portion of their shutter speeds available when batteries are dead. OTOH, the Autoreflex T has all shutter speeds available when batteries are dead and of course no shutter priority autoexposure. So when the electronics die, it can still function as a fully manual camera.
Originally Posted by OzJohn