The Sigma 16mm f/1.4 DC DN Contemporary AF Lens is a high-quality wide-angle lens compatible with Sony E-mount cameras. It has both auto and manual focus capabilities and is made of plastic. With a maximum aperture of f/1.4, it is ideal for low-light photography. The lens has a focal length of 16mm and is part of the Sigma DC series. It is manufactured in Japan and comes with both caps.