This lens is an essentially new US model, ideal for stills and videos of landscape, nature, events, and interior photography. The wide aperture of f/2.8 is constant throughout the zoom range, adjustable to f/22. The optical design affords a high degree of sharpness, color rendering, and clarity. The autofocus is fast and quiet with possible manual focus override. It comes with a front lens cover, rear lens cap, and a fitted case. Check out the many five star reviews to see why this is so highly rated!