The SIGMA sd Quattro series is equipped with a Foveon sensor that records all optical information with a film-like quality. The rich color gradation produces the same texture as human eyes, and reproduces colors perfectly. On top of “Foveon image quality”, the SIGMA sd Quattro series has many lenses and accessories for creative shooting. The SIGMA sd Quattro features an APS-C size sensor with 39 megapixels while the SIGMA sd Quattro H features an APS-H size sensor delivering high resolution of 51 megapixels.