This Sigma 16mm 1.4 lens is a great addition to any photographer's collection. It is designed for Canon EOS cameras and has both auto and manual focus options. The lens is perfect for wide angle and ultra wide angle shots, with a maximum aperture of f/1.4 allowing for great low-light performance. The mount is compatible with Sigma cameras and it is a great choice for those who are looking for a high-quality lens for their photography needs.