Lunar Orbiter was essentially a flying camera. The payload structure was built around a pressurized shell holding Eastman Kodak s dual-imaging photographic system, which used a camera with wide-angle and telephoto lenses that could simultaneously take two kinds of pictures on the same film. Men in in the picture are: Right to left Cliff Nelson, Calvin Broome, Israel Taback and Joe Mooreman. -- Published in James R. Hansen, Spaceflight Revolution: NASA Langley Research Center From Sputnik to Apollo, NASA SP-4308, p. 329.