View of a "Barn Door Tracker" that is mounted on a camera and attached to the window in the U.S. Lab

ISS006-E-25021 (8 February 2003) --- This view features a �barn door tracker� device assembled by astronaut Donald R. Pettit, Expedition 6 NASA ISS science officer, while onboard the International Space Station (ISS). The device is based on the fine gimbal movements in the IMAX camera mount for the Destiny laboratory window. A drill turns a screw, which moves the camera and its spotting scope.