Photography in the United States product introduced by George Eastman in 1884: a flexible, gelatin-coated paper, followed closely by a holder for a 24-frame roll. Soon after this, Eastman introduced Eastman American film, which featured a thin gelatin layer that was removed from the paper backing after development for additional clarity in making prints. In 1888, Eastman's company issued the first easy-to-use, lightweight Kodak camera. It was priced at $25, loaded with a hundred frames, and was almost instantly popular. When the user had used up all 100 exposures, he or she would simply mail the camera back to Kodak, where the used film was
Kodak DCS 300 series cameras had different sized CCD imaging chips, both of which were smaller than either 135 film or APS-C film frames. The 315's imager had a crop factor of 2.6 relative to 135 film ("35mm"), while the 330's was larger with a factor of 1.9. The Kodak modification to the Pronea 6i involved removing the camera's film back and mounting instead a Kodak digital back. This not only covered the back of the camera, but also extended beneath it, approximately doubling the camera's height. This was required to accommodate the large PC cards used as storage media, the six AA batteries