sigma 10-20mm f 4-5 .6 ex dc hsm lens for nikon digital slr cameras
designed exclusively for nikon digital slr cameras capable of wide-angle photography the sigma 10-20mm f 4-5 .6 lens is a powerful tool for landscape photography and other wide-angle applications . the lens offers an ultra-wide angle of view of 94.5 to 56.8 degrees with three special low dispersion sld glass elements and three aspherical lenses providing optimum image quality throughout the entire zoom range . the lens also incorporates a hyper sonic motor hsm to ensure quiet high-speed autofocusing in addition to full-time manual focusing . other features include a close focusing distance of 9.4 inches a non-rotating lens barrel that perfectly suits the petal-shaped lens hood included and a one-year warranty . specifications focal length 10-20mm maximum aperture f 4-5 .6 lens construction 14 elements in 10 groups angle of view 94.5 to 56.8 degrees number of diaphragm blades 6 minimum aperture f 22 minimum focusing distance 9.4 inches maximum magnification 1 6.7 mount nikon filter size 77mm filter size petal-type hood dimensions 3.3 inches in diameter and 3.4 inches long weight 17.5 ounces warranty 1 year