http://mars.jpl.nasa.gov/images/pia16051_figure_1_raw_smaller-full.jpg.
This panorama image taken by the Curiosity rover is 29185 * 4144 pixels and contains a massive amount of data. The rovers cameras are 2 mega-pixels, this is less than a consumer smart-phone camera, but they have many features than lift them above any consumer level digital camera. The 34 millimetre mast-cam took this image, a composite of 130 images that were stitched together to form a massive panorama image. This image is a very large file size, but well worth the download time.
http://mars.jpl.nasa.gov/msl/multimedia/images/?ImageID=4421.