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 Signet used a significant amount of plastic except the Signet 35 which was machined from an aluminum casting, and shared style and durability with the Kodak Chevron camera (continuation of the Kodak Medalist series). The Signet 80 was Kodak's second attempt at offering a US made full camera system, the first being the ill-fated Ektra system. The Signet 80 including the accessory 35mm and 90mm lenses, cost about 75% of the cost of a comparable top-of-the-line Kodak Retina III system. The Signet line had quality control and design issues which limited appeal and durability. Despite limitations, the lenses are considered to