Among the instruments the Surveyor spacecraft took to the Moon was a TV camera consisting of a vidicon tube, 25- and 100-mm focal length lenses, shutters, filters, and an iris. It was inclined about 16 degrees to the spacecraft’s axis, and it featured a movable mirror to increase the its viewable area. The unit was controlled from commands from Earth. When data was sent back to Earth, it was converted to a standard television signal and shown on a slow scan monitor. There was also a scoop on board that could dig trenches, positioned under the tv camera so technicians could image the soil before and after it was disturbed, another way to draw some conclusions about the surface characteristics.