Key FeaturesEF-M-Mount Lens/APS-C Format89.6mm (35mm Equivalent)Aperture Range: f/1.4 to f/16One SLD Element, Two Aspherical ElementsSuper Multi-Layer CoatingStepping Motor AF SystemWeather-Sealed ConstructionRounded 9-Blade DiaphragmIn the BoxSigma 56mm f/1.4 DC DN Contemporary Lens for Canon EF-MS..