The Sigma 12mm f/1.4 DC Contemporary Lens for Sony E is an ultra wide prime lens for APS-C format mirrorless cameras, which offers high image quality, fast AF and much more for stills and video creators. This compact and lightweight ultra-wide-angle lens combines high performance and portability, bringing new perspectives to a wide range of scenes, whether stills and video, including outdoor landscapes, travel, and street photography. It features an E-Mount/APS-C Format, 18mm (35mm Equivalent), Aperture Range: f/1.4 to f/16, 14 elements in 12 groups, Minimum Focus Distance: 17.2cm, Built-In Aperture Ring, Rounded 9-Blade Diaphragm, Dust and Splash-Proof Structure, Filter Size: 62mm, and a Weight of 225g.