Sigma has revealed two new high-end mirrorless camera systems, with the interchangeable lens cameras including SA mounts and Foveon X3 image sensors. The sd Quattro is able to capture a 39-megapixel image using a similar APS-C sensor size to the rest of the cameras in the dp Quattro line, while the sd Quattro H opts for a larger APS-H sensor, making it capable of producing larger 51-megapixel photographs.
