This is one of the engineering flight spare Lunar Orbiter spacecraft on display at the National Air and Space Museum in Washington DC. Larger image
This diagram shows the major subsystems of the Lunar Orbiter spacecraft. Additional Photos below show the NASM exhibition from a variety of angles.
This is the main high-gain antenna. Larger image
The camera system is inside the large silvery container between the solar panels and the propulsion system. Imagine what could be used today to accomplish the same task. Larger image
This is the face of the spacecraft (camera system) that would point at the Moon. Larger image
These are the solar cells that powered the spacecraft Larger image
Closeup of the solar cells. Larger image