High Performance: Two aspherical elements are used to limit distortion and spherical aberrations and also contribute to greater overall sharpness and accurate rendering Perfect Setting: A Super Multi-Layer Coating has been applied to lens elements to minimize lens flare and ghosting to produce contrast-rich and color-neutral imagery, even in backlit conditions Low-Light Capture: Bright f/1.4 maximum aperture excels in low-light conditions and also affords increased control over depth of field for achieving selective focus effects Weather-Proof: The bayonet mount is constructed from brass for ensured accuracy and durability with rubber sealing incorporated mount design to render it dust and splash resistant Mixing a comfortable wide-angle design with an ultra-fast maximum aperture, the 16mm f/1.4 DC DN is part of Sigma's Contemporary series of lenses and is designed for use with Canon EF-M-mount mirrorless cameras. Characterized by its bright f/1.4 maximum aperture, this lens is adept at working in low-light conditions and also affords increased control over the depth of field for selective focus control. The optical design makes use of several low dispersion and aspherical elements, which control color fringing and various aberrations to provide high sharpness and clarity throughout the aperture range. Individual elements also feature a Super Multi-Layer Coating to suppress flare and ghosting for greater contrast and color fidelity when working in strong lighting conditions. Benefitting the optical assets, this lens also sports a stepping AF motor for quick, quiet, and smooth focusing performance that suits both still photography as well as video applications. The Sigma 16mm f/1.4 DC DN Contemporary Lens for Canon EF-M comes with 1-Year Limited Warranty with a 3-Year Extension for the USA, +1 Sigma LCF-67 III 67mm Lens Cap, +1 Rear Lens Cap, +1 Sigma Petal-Type Lens Hood for 16mm f/1.4 DC DN Lens +1 Tiffen 67mm UV Protector Filter, +1 64GB Memory Card, and +1 With Camera Bag. Product Detail of Sigma 16mm f/1.4 DC DN Contemporary Lens for Canon EF-M: Focal Length: 16mm (35mm Equivalent Focal Length: 25.6mm) Maximum Aperture: f/1.4 Minimum Aperture: f/16 Lens Mount Canon: EF-M Lens Format Coverage: APS-C Angle of View: 83.2° Minimum Focus Distance: 9.8 / 25 cm Maximum Magnification: 0.1x Optical Design: 16 Elements in 13 Groups Diaphragm Blades: 9, Rounded Focus Type: Autofocus Image Stabilization: No Filter Size: 67 mm (Front) Dimensions (ø x L): 2.84 x 3.63 / 72.2 x 92.3 mm Weight: 14.29 oz / 405 g