Sigma 18-50mm f/2.8 EX DC HSM Macro Lens For Canon Rebel XT XTi 350D 400D 50D XSI XS T1I T2I 5D 10D 20D 30D 450D Includes PRO HD 3PC Filter Kit + 7 Year Lens Warranty + Close Up Lens Kit + More Compact size weighing 16 ounces and only 3.2 inches in length Two Aspherical glass elements offer correction for distortion, SLD (Special Low Dispersion) glass & ELD (Extra Low Dispersion) glass element provides optimum color correction & sharpness Super Multi-Layer lens coating reduces flare & ghosting & assures high image quality throughout the entire zoom range Inner focusing system eliminates front lens rotation making the lens suitable for use of polarizing filters and a minimum focusing distance of 8" & a maximum magnification factor of 1 to 3 make this excellent for up-close subjects Kit includes: 7 year warranty extension, Opteka 3 Piece Filter kit, Close-Up Macro Set and a 5 piece lens cleaning kit