1. A camera for photographing images of documents on a film strip at a reduced scale, said film extending between an upstream supply of film to a downstream takeup of film, said camera comprising: a document support table for placing a document to be photographed thereon; means for projecting along an optical path a reduced image of the document placed on the table, onto the film strip to form a latent image thereof; a shutter for controlling the exposure time of the latent image of the document on the film; means for moving the film to advance the latent image out of the optical path in a downstream direction after exposure has been completed and to advance an unexposed portion of the film from an upstream position into the optical path; means at a position downstream from the optical path for writing an image mark and an image address on the film adjacent the latent image of the document; means for storing information at the time the latent image of the document is formed concerning the size of the image mark and the image address; and means for inhibiting the writing of said stored information relating to an image when said latent image associated therewith is deemed defective in some way.