The Sigma 18-35mm 1.8 DC HSM is ideal for landscapes, portraits, still life, snap shots, casual, and close-ups. The Hyper Sonic Motor (HSM) ensures smooth, fast and accurate autofocusing. The use of Thermally Composite Material (TSC) reduces size and weight but increases the lens durability. Its Global Vision design works with its compatibility with the Sigma USB dock for further customization. A 9 blade rounded diaphragm also creates beautiful background blur.