Sigma APO 70-200mm F2.8 EX DG OS HSM

This bright, high quality telephoto zoom lens contains 22 elements (including 3 SLD and 2 FLD glass elements) in 17 groups. This lens covers 24x36mm ?full-frame? sensors and has an optical image stabilisation system (OS) that compensates approximately four stops. Its HSM function assures smooth and silent auto focusing. Chromatic aberration is reduced to a minimum and sharpness is at a very high level over the entire focal length range.