This ultra wide-angle zoom lens for digital SLR cameras, with the first-ever focal length range of 10-24mm - the 35mm equivalent of 16mm ultra wide-angle to 37mm semi-wide-angle-is a perfect tool for creating dramatic landscape, cityscape, and seascape imagery. At the ultra wide-angle setting, you'll be able to capture vistas beyond what the eye can see. At the semi-wide-angle setting, you'll capture scenes with angles of view almost as spectacular.