A fast, ultra wide-angle zoom lens offering excellent optical performance throughout the zoom range. A constant f/2.8 maximum aperture make this an ideal lens for low-light photography. This lens is in excellent condition with only the lightest signs of use. The optics are clean and clear with no marks or scratches. There is an extremely minor amount of dust within the lens. The lens barrel shows only the lightest cosmetic marks. The focus ring is smooth and in great condition. The lens mount is in good condition.