The Sigma HSM DC EX lens lets you shoot landscape photography, building interiors, party pictures etc with clarity and details. With a maximum aperture of f/4.0, this Sigma camera lens for Nikon helps you capture clear photos even in low-light conditions. With a construction of 14 elements in 10 groups, this Sigma 10 mm-20 mm f/4.0-5.6 lens effectively corrects chromatic aberrations in your photos. The 6-blade diaphragm in this Sigma 10 mm-20 mm f/4.0-5.6 lens gives you great out-of-focus shots. Featuring a Hyper-Sonic motor (HSM), this Sigma camera lens for Nikon ensures fast and silent focusing. The internal focusing system optimizes the overall optical performance of the Sigma HSM DC EX lens at various distances. All in all, this Sigma camera lens for Nikon makes a great addition to your camera kit.