The EOS 5D Mark IIs newly designed full-frame 21.1-megapixel CMOS sensor features ISO sensitivity from 100-6400, expandable to 50, 12,800 and 25,600. Large 6.4μm2 pixels have been redesigned to capture more light and yield a better signal to noise ratio to ensure lower noise images throughout the ISO range. The full frame sensor has the same dimensions as a frame of 35mm film. This means that wide-angle lenses stay wide, without the change in angle of view associated with smaller sensor cameras