The Sigma 28-70mm F2.8 DG DN C is a versatile, full-frame lens for Sony E-Mount mirrorless cameras, ideal for landscapes, portraits, weddings, street photography, close-ups, and architecture. It is lightweight, portable, and also suitable for video recording. The lens construction features 16 elements in 12 groups and Super Multi-Layer Coating. It offers a constant f/2.8 aperture and packs high-quality optics into a compact 470g design with superb results across the zoom range. This lens redefines the standard zoom for mirrorless cameras by combining outstanding optical performance, an f/2.8 constant aperture, and a lightweight, compact body. Its design is based on the existing 24-70mm f/2.8 DG DN | Art, but with a focal range starting at 28mm, making the lens body significantly smaller and lighter while maintaining superb optical performance. It is the smallest and lightest lens in its class. The lens prioritizes portability and delivers professional-quality results in a body small enough for casual outings. Sigma’s optical engineers have incorporated a new combination of coatings and structural elements, making this standard zoom well-equipped for various shooting environments. Advanced production and manufacturing techniques ensure exceptionally high build quality. The optical design includes three aspherical, two FLD, and two SLD elements, which provide thorough correction of axial chromatic aberration and sagittal coma aberration for sharp images from center to edge. Anti-ghosting design, Super Multi-Layer Coating, and Nano Porous Coating control flare for high-contrast results, even in backlit conditions. It also features a water and oil-repellent coating on the front element.