Sigma 18-50mm f/2.8 DC DN Contemporary Lens (Sony E)Ideal for a wide range of photo and video applications including landscapes, portraits, street photography, architecture, and events, the 18 50mm f 2. 8 DC DN Contemporary Lens from Sigma is a small, light, and bright standard zoom for crop sensor mirrorless cameras. Offered here with a Sony E mount, this lens provides a versatile full frame equivalent zoom range of 27 75mm and a wide constant aperture of f 2. 8 throughout the entire zoom range. The