High-sensitivity reflex cell. It receives all the light rays comi ng through the lens, a nd is powered by the camera's Nickel-Ca dmium bat tery. This cel l triggers the micromotor d ri ving the electronically-controlled iris diaphragm of the lens itsel f ( Reglo matic) ; this control is pe rfo rmed by a shock-proo f galvanometer (Gossen ) fi tted with a check ing poin ter visible in the viewfinder. I)OWER SUPPLY , COUNn : RS REL EASE EI"ECTRI CA L SPECIFI CATI ONS FI L MI NG SPEEDS