Roll film of Peter's camera. David Henderson Houston (born June 14, 1841; died May 6, 1906), originally from Cambria, Wisconsin, patented the first holders for flexible roll film. Houston moved to Hunter in Dakota Territory in 1880. He was issued an 1881 patent for a roll film holder which he licensed to George Eastman (it was used in Eastman's Kodak 1888 box camera). Houston sold the patent (and an 1886 revision) outright to Eastman for $5000 in 1889. Houston continued developing the camera, creating 21 patents for cameras or camera parts between 1881 and 1902. In 1912 his estate transferred the remainder
Kodak DC Series for 35 mm single lens reflex film cameras. With physical dimensions of 31 x 102 x 61 mm, the Kodak DC20 was the first ultracompact digital camera. Its sleek compact size would remain unrivaled until the release of the Canon Digital Ixus and Casio Exilim. There were several add-on lenses released for the Kodak DC20. These included a macro adapter, a telephoto converter, and a wide-angle converter from Tiffen. These were clip-on lenses since the original lens had no thread. There was also an add-on photo flash unit made by Kodak. The Kodak DC25 was released about the same time