35mm camera with automatic exposure control
Manufacturer: Zeiss Ikon, Stuttgart
Production period: 1960 ... 1962
Lens: Zeiss Tessar 2,8 / 50mm
Diaphragm: 2,8 ... 22
Shutter: Prontormat-S 1/30 ... 1/300 sec and B
The trend of automatic exposure control started in 1959 with the Agfa Optima. Other manufacturers followed, here is the example presented by Zeiss Ikon. All these solutions were based on a selenium photo cell and very clever mechanics. No batteries were required.