This the spectrograph shutter assembly from the original camera used on the Hale 200-inch telescope at the Cassegrain focus to proof test the split field concept design for the Wide Field/Planetary camera of the Hubble Space Telescope. The Museum collection holds the complete, working camera including split field optics and two of the original four CCD camera units that were used programmatically on the 200-inch for many years and featured in Richard Preston's "First Light" as a galaxy and quasar finder.
The California Institute of Technology donated the 4-shooter to the Smithsonian in September 1999.
This object is not on display at the National Air and Space Museum. It is either on loan or in storage.