Sigma 17-50mm f/2.8 EX DC OS HSM FLD Zoom Lens for Canon DSLR Camera includes Bonus Sandisk 64GB Memory Card SIGMA AUTHORIZED DEALER With FULL Warranty INCLUDES BONUS Sandisk 64GB Extreme SD Memory UHS-I Card w/ 90/60MB/s Read/Write ALSO INCLUDES Lens Hood, Front and Rear Lens Caps, Carrying Case, Limited 1-Year North and South America Warranty Against Manufacturing and Workmanship Defects. Limited 3-Year U.S.A. Extended Warranty Extension Against Manufacturing and Workmanship Defects MINIMUM FOCUSING DISTANCE of 11 inches throughout the entire zoom range. MAGNIFICATION RATIO of 1:5. FOCAL LENGHT from 17mm wide angle and offers a LARGE APERTURE of F2.8 throughout the entire zoom range. Sigmas own FLD glass elements, which have performance equal to fluorite along with two glass mold and one hybrid aspherical lens, provide excellent correction for all types of aberrations. Lens Construction - 17 Elements in 13 Groups Maximum Magnification - 1:5 Angle of View - 72.4-27.9 degrees Filter Size Diameter - 77mm Number of blades - 7pcs (Rounded diaphragm) Lens Hood - Petal-type hood (LH825-03) Minimum Aperture - F22 Dimensions (Diameter x Length)- 83.5x91.8 mm/3.3x3.6 in Minimum Focusing Distance - 11in/ 28cm Corresponding Mount- Canon Sigma 17-50mm f/2.8 EX DC OS HSM FLD Zoom Lens for CanonDSLR Cameras Front &amp; Rear Lens Caps Lens Hood Case 1-Year Worldwide Protection+ 3-Year Extended USA Protection SanDisk 64GB Extreme SD Memory UHS-I Card w/ 90/60MB/s Read/Write