Sigma AF 18-35mm f/1.8 DC HSM Lens for Canon includes Bonus Vivitar UV, Polarizer & FLD Deluxe Filter Kit and More SIGMA AUTHORIZED DEALER With FULL Warranty INCLUDES BONUS Zeikos 3pc. Lens Cleaning Kit, Lens Cap Keeper, 1 Piece Micro Fiber Cloth, Vivitar Dust Removal Blower System, Vivitar 72mm UV, Polarizer & FLD Deluxe Filter kit (set of 3 + carrying case), Vivitar Tri-fold Memory Card Wallet - Stores up to 3 Memory Cards, Xit Hi-Speed SD and Micro SD USB 2.0 Card Reader, Xit 60" Full Size Photo / Video Tripod, AND Xit Deluxe Digital Camera/Video Padded Carrying Case 18-35MM FOCAL LENGTH, 27-52.5mm equivalent focal length on APS-C cameras. F1.8 MAXIMUM APERTURE; F16 minimum. RING-TYPE ultrasonic-type AF motor with full-time manual focusing, 72mm filter size. MINIMUM FOCUSING DISTANCE 28 cm/ 11.0 in. AVAILABLE IN CANON EF (EF-S), Sony Alpha (DT), Nikon F (DX) mounts.