The Electro 35 G was introduced in 1968 with largely cosmetic changes. Without a battery to power the meter, the shutter defaults to its top speed of 1/500 second. The metering system can keep the shutter open for up to 30 seconds. SLRs would wait many years for a similar capability with off-the-film metering. This system allows the shutter speed to be completely step-less and to adapt to changing light levels. The light metering electronics works by accumulating the measured light level and only releasing the shutter when it has determined enough light has fallen on the film. The film speed adjustment is not implemented electronically instead, a simple twin-bladed diaphragm closes in front of the light sensor as the film speed is reduced. Light levels are measured using a cadmium sulphide (CdS) photoresistor and powered by a mercury battery. It has a 'cold' accessory shoe and the meter accepted film speeds from 12 to 400 ASA.
The original Electro 35 was introduced in 1966.
