Kit includes: 1) Sigma 17-35mm EX DG IF HSM Aspherical Zoom Lens; 2) 6-Piece Cleaning Kit; 3) Sigma Spudz Microfiber Cleaning Cloth; 4) Hoya 77mm UV Protector Filter. ♦ Sigma 17-35mm Lens includes: Front & Rear Lens Caps; Lens Hood; Instructions; Sigma USA Warranty. ♦ The Sigma 17-35mm has an internal focusing system which eliminates front lens rotation. This makes it easy to use with circular polarizing filters plus it enables using a more effective petal-shaped lens hood to reduce flare as much as possible for more vivid images. It incorporates aspherical lens elements to minimize distortion and spherical aberration. With an impressive minimum focus distance of only 10.6 inches at all focal lengths, you are able to place subjects in the foreground to give a sense of depth to your scenic shots for truly creative and well-composed photographs. ♦ Digital SLRs such as the Nikon D40, D80 and D200 have a 1.5x Lens Factor and the Canon Digital Rebel XTi and EOS 30D have a 1.6x Lens Factor which makes getting true wide angle photos with a 28-80mm lens problematic. On 35mm Film Cameras and Full Frame sensor Digital SLRs, you get the listed focal length range without any sensor cropping. When used on cameras with a 1.5x lens factor you get a wonderfully wide 25.5mm to 52.5mm effective focal length zoom lens that's just what you need for scenic landscapes; family reunions; as well as terrific vacation and travel photos. ♦ Hoya UV Filters are made of optical glass and can be left on your lenses at all times — even when taking pictures. A filter prevents damage to the delicate surface coatings of the lens and shields the front element from scratches. A UV filter enhances image quality by reducing the adverse effects of ultraviolet light which can cause outdoor photographs to appear hazy and indistinct. ♦ This Sigma Lens-plus-necessities Kit will help give you the amazing vacation, travel, and family photos you've always wanted.