The Sigma 14-24mm f/2.8 DG HSM Art Lens for full-frame Nikon F cameras is an ideal choice for architecture and landscape photography. The stable maximum aperture of f/2.8 ensures you to take stunning photographs, even in low-light conditions. The optical design consists of 17 elements in 12 groups, which includes three Fluorite Low Dispersion (FLD), three Special Low Dispersion (SLD), and three aspherical elements helps to lessen color fringing and chromatic aberrations. Water- and oil- coating is fabricated on the front lens elements to work in unpleasant environmental conditions. Effortless focusing performance is delivered with the lens’ integrated Hyper Sonic Motor. The nine-blade diaphragm helps to create round bokeh.