These are parts associated with the Wide Angle Camera (WAC) from the Lunar Reconnaissance Orbiter (LRO) spacecraft.
The WAC is a CCD camera equipped with a wide baffle. It can capture broad images in five visible light bands and two ultraviolet light bands. Images from the WAC have been used to produce detailed photomosaic maps of the Moon. LRO arrived at the Moon in 2009.
This flight spare instrument is identical to the flown instrument built by Malin Space Science Systems. NASA transferred the camera to the Museum in 2016.
This object is not on display at the National Air and Space Museum. It is either on loan or in storage.