Film about the photography industry.

Camera lenses are prepared and ground in a factory in preparation for use in aerial photography for the military. Lenses go through various tests before a man signs off that they are OK.

Man shoots pictures from an airplane flying over a industrial site in Cleveland, Ohio. The photographer hands the film to a dark room technician. Man works in a dark room, analyzing the photos. He plots a map from these. Very cool image of him wearing spectacles or goggles as he creates a technical drawing.