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 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