Digital camera information about the astronauts' position. As with Texas Instruments employee Willis Adcock's filmless camera (US patent 4,057,830) in 1972, the technology had yet to catch up with the concept. The Cromemco Cyclops was an all-digital camera introduced as a commercial product in 1975. Its design was published as a hobbyist construction project in the February 1975 issue of "Popular Electronics" magazine, and it used a 32×32 Metal Oxide Semiconductor sensor. Steven Sasson, an engineer at Eastman Kodak, invented and built the first self-contained electronic camera that used a charge-coupled device image sensor in 1975. Early uses were mainly military and
Kodak Stereo Camera photography. The film counter was the countdown type, which would be manually set when film was loaded according to how many pairs the roll could take. The number 20 was in red and there were red marks at 15 and 28, for use with standard 20 and 36 exposure rolls of film. A properly loaded 24 exposure roll of film will give 18 stereo pairs, but there is no special marking as 24 exposure rolls of film were not standard at the time the camera was produced. Opposite the counter was another manually set dial which indicated whether the cameras