Though that only describes the Bayer array (which is used by most cameras except for Fujifilm and Sigma). Fujifilm's mirrorless cameras use what they call X-Tr

Though that only describes the Bayer array (which is used by most cameras except for Fujifilm and Sigma). Fujifilm's mirrorless cameras use what they call X-Trans CMOS sensor tech - http://www.fujifilm.eu/uk/products/digital-cameras/interchangeable-lens-cameras/model/x-pro1/features/fujifilm-x-trans-sensor-technology/ http://www.fujifilm.eu/uk/products/digital-cameras/interchan... And Sigma uses the Foveon X3 CMOS sensor - http://en.wikipedia.org/wiki/Foveon_X3_sensor http://en.wikipedia.org/wiki/Foveon_X3_sensor