The Sigma 16mm F1.4 AF DC DN Contemporary lens offers high-speed and a bright f1.4 aperture. This wide-angle lens is perfect for landscape and astrophotography. The wide and bright F1.4 aperture will let in a large amount of light which in turn makes it perform particularly well in low life. That same wide aperture is also able to produce stunning bokeh. This lens is a welcome addition to Sigma's high-quality and professional DC DN lens series.