The Sigma 56 mm f1.4 DC DN / contemporary is an innovative interchangeable lens for mirrorless APS-C format, offering f1.4 brightness. A wide-angle lens with a wide diameter that mirrorless photographers desire. The 56 mm f1.4 DC DN / contemporary combines highest level optical results with f1.4 brightness. By sharing the same building principles as the Sigma 30 mm f1.4 DC DN / contemporary, the 56 mm f1.4 DC DN / contemporary adopts an optical scheme of 10 elements in 6 groups and uses high-quality materials. The lens minimises optical aberrations and offers excellent resolution both at full apertures and at all other diaphragm values. The optical scheme and linear motor provide progressive focus when shooting video. Do not forget the grafting that adopts special gaskets against water and dust. The functionality of fixed focals to better try the meanings of photography. Image quality that rivals our art line lenses. The stepper motor ensures progressive and quiet autofocus. Water and dust proof design. The large standard lens hood eliminates side rays. Designed to minimise flare and ghost images. "Made in Japan” with incredible craftsmanship. TSC, the material used to achieve a compact structure and better performance. Available for the coupling conversion service. 9-slat diaphragm. Brass bayonet fitting. Optical technical specifications: 10 elements in 6 groups. Minimum diaphragm aperture: f16. Filter diameter: 55 mm Shooting angle (DC): 28.5° Minimum focus distance: 50 cm. Dimensions (diameter x length): Diameter 66.5 mm × 59.5 mm. Diaphragm slats: 9. Maximum magnification ratio: 1:7.4 Weight: 280 g.