Canon Ef-s 55-250mm F/4-5.6 Is Autofocus Lens Kit for Canon EOS Rebel Xs(1000d), Xsi(450d) Dslr Cameras Focal length: 55-250mm, Maximum aperture: f/4 to f/5.6 Lens construction: 12 elements in 10 groups, including one UD-glass element, Diagonal angle of view: 27 degrees (at 50 feet) to 6 degrees (at 15 feet), with APS-C image sensors Focus adjustment: DC motor, gear-driven (front focusing design), Closest focusing distance: 3.6 feet (0.31x maximum close-up magnification) Filter size: 58mm, Dimensions: 2.8 inches in diameter and 4.3 inches long Weight: 13.8 ounces, Warranty: 1 year