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 man signs off that they are okay. Man shoots pictures from an airplane flying over industrial site in Cleveland. Photographer hands film to 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/goggles as he makes technical drawing.

Not Explicit