Sigma 56mm F1.4 DC DN ContemporaryAn especially sleek portrait length prime, the 56mm f 1. 4 DC DN is part of Sigma's Contemporary series of lenses, and is designed for use with APS C (Sony. Canon, Leica, Nikon or FujiFilm, ) or Micro Four Thirds mirrorless cameras. The lens is characterized by its bright f 1. 4 maximum aperture, which suits working in difficult lighting conditions and also offers improved control over depth of field for isolating subjects and working with selective