Lunar Orbiter 5 completed the farside coverage and acquired medium (20 m) and high (2 m) resolution images of 36 pre-selected areas. Luna Orbiter 5's primary mission was to contribute to a comprehensive map of the Moon and conduct general observational surveys.

Lunar Orbiter 4 photographed the entire nearside and 95% of the farside, and Lunar Orbiter 5 completed the farside coverage and acquired medium (20 m) and high (2 m) resolution images of 36 pre-selected areas Lunar Orbiter 4's primary mission was to contribute to a comprehensive map of the

Lunar Orbiter 3's primary mission was to photograph smooth areas of the lunar surface to help select safe landing sites for the Apollo missions. The spacecraft's mission was site confirmation as opposed to site search.

Lunar Orbiter 2's primary mission was to photograph smooth areas of the lunar surface to help select safe landing sites for the Apollo missions. The spacecraft took photos covering nearly 1.6 millions square miles of the Moon's surface.

The Lunar Orbiter 1 mission was designed primarily to photograph smooth areas of the lunar surface for selection of safe landing sites for the Apollo missions.