Abstract: A pocket size single lens reflex camera and a film cartridge for use therewith. The camera is constructed so that lines of light coming from an object being photographed is directed through an exposure window of the film cartridge within the camera body at a right angle to and aligned with the longitudinal axis of the take-up spool of the film cartridge as it enters the exposure window of the film cartridge. The film cartridge consists of a substantially nontransparent housing member having a strip of paper backed photographic film located in its interior. An exposure window is provided in one end of the housing member for allowing the film within the housing member to be selectively exposed. Indicia for indicating the number of exposures taken is provided on the paper backing of the film. An exposure indicia window is provided in the opposite end of the housing from the exposure window for allowing the exposure identifying indicia to be viewed.