The Sigma camera lens for Nikon is designed with original Sigma anti shake compensation functionality. With a 18-250 mm f/3.5-6.3 lens, this Sigma camera lens for Nikon has four special low dispersion glass elements reducing chromatic deviation and preventing any distortion in the images. Designed with internal focusing system and three aspherical lenses, this 18-250 mm f/3.5-6.3 lens ensures responsive and fast auto focus throughout the zooming range. This Sigma camera lens for Nikon allows the shutter speeds nearly four stops slower.