Where the Super was a refinement of a proven design, the Electronic was a cutting edge design. Based on the chassis and layout of the Super, it featured the world's first electronically governed shutter. Generally cutting edge designs have flaws in their initial designs, and the Electronic was no exception. The flaw was in the power for the meter and shutter were both drawn off the same battery. This was rectified in a running design change with no fanfare or change in model designation. Later cameras have two battery compartments, the second under the mirror.
The electronic shutter not only allowed for greater accuracy, it allowed for the shutter timing function to be controlled externally by the Tele-sensor, an accessory meter cell which turned the camera into an aperture priority auto exposure camera. Shutter speeds ranged steplessly from 1/1000th up to 8 seconds. An accessory shutter speed indicator plugged into the side of the Tele-sensor, displaying the speed selected.
The Tele-sensor was not intended for handheld use, but rather for remote or unattended photography, although it often was. The Electronic also featured an electric motor drive, the only production camera Zeiss ever offered one on. The motor ran at 2 FPS, and could be powered by a battery handgrip, or by the Electronic Remote Timer, which was a remote release, an intervalometer and a bridge to other remote releases such as radio, infrared, etc. To make the offering complete, Zeiss offered a 450-exposure bulk film back.
The Electronic was introduced in 1968, and only 3100 were produced. The camera was available in chrome and black finishes. The first style was produced from September 1968 until March 1970, with serial numbers running G36001 to G37500. The improved version with two power sources ran from serial number R55001 through R57000. Cameras after R55900 have a coated mirror.
The final batch of cameras manufactured carry the Carl Zeiss logo, rather than Zeiss Ikon. It was projected that 500 would be assembled, but reportedly only 100 were built. The serial numbers for these cameras were R64501 through R6500. The serial numbers allocated don't match the production figures. Probably not all numbers were used, and/or some completed units did not leave the factory, and were therefore not added to the total production figures.
Motor with grip attached.
Front and back views of the Electronic Remote Timer
Shutter Speed Indicator.