The Sigma 17mm F4 Dg Dn Contemporary Lens for Sony E Mount features an ultra-wide-angle lens that matches the optical performance standards set by the Sigma contemporary line of lenses. This set contains Sigma 17mm F4 Dg Dn Contemporary Series Ultra-Wide Angle Lens for Sony E Mount, LCF55-01M Magnetic Metal Lens Cap, LH576-03 Petal Type Lens Hood, Lcf-55 Iii Front Cap, Lcr Ii Rear Cap, and Limited 4-Year Warranty.