the Sigma SD14 utilises a Foveon X3 sensor, featuring a unique three-layered pixel configuration \endash one layer for red light, one for green and one for blue. This, says Sigma, delivers images with an astonishingly vivid look and feel beyond that which you'd expect from the already impressive pixel count.
Other features include a removable dust protector (essential when changing lenses), light sensitivity range from ISO100 to ISO1600 and the ability to shoot common JPEG as well as best quality RAW files.