Aboard the MGS is the Mars Orbiter Camera (MOC). The MOC is used to get high resolution images from the surface of Mars. This camera is able to obtain pictures of both wide angle and narrow angle. The two wide angle lenses are used to capture the Martian landscape from horizon to horizon while the narrow angle lens has a resolution of up to 1.4 meters/pixel. This translates to mean that an object as small as 1.4 meters wide could be seen by the MOC, though it would be a single square pixel.
The result: a picture quite different than the "Face" that Viking had beamed back to earth two decades ago.