The Foveon X3 Quattro Sensor is the world’s only image sensor able to record all optical information in its three-layer system. With outstanding “Foveon image quality” at its core, the SIGMA sd Quattro series is ideally developed for SIGMA’s high-performance lens lines and genuine accessories. Every element of the camera is optimized to offer an ideal shooting performance from both functional and sensory perspectives, such as a grip designed for everyone’s ease of use, the concise GUI to display settings and shooting information and the layout of buttons and dials for users’ instinctive and precise access. APS-C / APS-H sensors available.