Sigma SD Quattro + 30mm f/1.4 DC HSM

Sigma SD Quattro 30mm f/1.4 DC HSM is a photographic kit consisting of the Sigma SD Quattro mirrorless camera with Sigma SA mount and the Sigma 30mm f/1.4 DC HSM Art lens. The camera body uses a 29 MP effective APS-C Foveon X3 Quattro sensor, designed with a layered structure that records color information differently from traditional Bayer sensors, providing a distinctive rendering of detail and color, especially in controlled lighting conditions and at low ISO settings. The camera features an electronic viewfinder, rear display, RAW X3F and JPEG file recording, ISO sensitivity from 100 to 6400, and compatibility with Sigma SA lenses. The 30mm f/1.4 DC HSM Art lens is a bright APS-C prime lens, equivalent to approximately 45 mm on full frame, suitable for everyday photography, environmental portraits, reportage, still life, and available-light shooting. The f/1.4 maximum aperture allows working with shallow depth of field, while the HSM motor manages autofocus with relatively quiet operation. The optical design of the lens consists of 9 elements in 8 groups, with a minimum focusing distance of 30 cm, a 9-blade diaphragm, and a 62 mm filter thread. Sigma SD Quattro 30mm f/1.4 DC HSM is suitable for photographers looking for an unconventional APS-C system focused on high photographic rendering in controlled conditions, with a bright standard lens and the distinctive color output of the Foveon sensor. It is important to consider that the Sigma SA system is now less common than modern mirrorless mounts and that the Foveon RAW workflow requires specific software and file management.