LROC Narrow Angle Camera (NAC)
This is a flight spare of the two NACs operating on the Lunar Reconnaissance Orbiter. At its heart is a powerful telescope with a 700-millimeter (28-inch) focal length. (The silver part is the telescope; the black part is a stray-light baffle). It allows the cameras to take black-and-white images with a resolution of a few meters or less. From an altitude of 50 kilometers (30 miles), a single NAC pixel covers an area on the surface only 50 centimeters (20 inches) square.
Builder: Malin Space Science Systems, San Diego
Lent by NASA/GSFC/Arizona State University