Camera sensitive photographic materials became available, cameras began to incorporate mechanical shutter mechanisms that allowed very short and accurately timed exposures to be made. The use of photographic film was pioneered by George Eastman, who started manufacturing paper film in 1885 before switching to celluloid in 1889. His first camera, which he called the "Kodak," was first offered for sale in 1888. It was a very simple box camera with a fixed-focus lens and single shutter speed, which along with its relatively low price appealed to the average consumer. The Kodak came pre-loaded with enough film for 100 exposures and needed
Kodak Retina Vollenda miniature folder, along with the Ranca and Pupille collapsible cameras were smaller than the Leica and Contax cameras, but could use 50mm f:3.5 Elmar and other similar Tessar formula lenses in Compur shutters to create a larger 30mm x 40mm image on 127 rollfilm. The advantage of 35mm would be the elimination of the paper-backer allowing more images per roll of film. All of the Kodak Retina cameras from the mid 1930s to the late 1950s were folding cameras with a short self-erecting bellows, lens board, and folding metal door/cover. These folding Kodak Retina cameras are listed below with