Capture realistic images with your SLR camera with the 18-50mm F2.8 EX DC Macro Zoom from Sigma Corporation. The lens features a large aperture of F2.8 throughout the entire zoom range a minimum focusing distance of 7.9 inch and a maximum magnification of 1:3, making it ideal for close-up photography. The lens includes Special Low Dispersion (SLD) and Extraordinary Low Dispersion (ELD) glass elements provide excellent correction of color aberrations. Incorporating an inner focusing system, the lens eliminates front lens rotation, making it particularly suitable for using the petal-type lens hood (supplied) plus circular polarizing filters.