The Sigma 28-70mm is the ideal general purpose wide angle zoom lens. Its wide enough for most scenic and landscape assignments and when used indoors for building interiors or groups of people, its wide angle effect is not as extreme as with shorter focal length lenses. A forgiving wide angle lens for newcomers to wide angle photography and highly effective for professionals with its construction and fast 2.8 aperture. It features an easy grip two touch design with a wide focus ring and narrow zoom ring. This high speed performance is excellent for photojournalists doing low-light documentary photography. This lens has D technology for communiction with Nikon bodies.