Sigma APO 70-200mm f/2.8 EX DG OS HSM Lens for Sigma SA

Renowned for its versatility, the Sigma SA-mount APO 70-200mm f/2.8 EX DG OS HSM from Sigma is a telephoto zoom lens covering a useful portrait-length to medium telephoto range. Characterized by its bright f/2.8 constant maximum aperture, this lens excels in difficult lighting conditions and also affords flexible depth of field control for isolating focus. Featuring an apochromatic designation, this lens's optical design employs a series of low dispersion elements to virtually eliminate chromatic aberrations and color fringing for high clarity and color accuracy. A multi-layer coating is also used to control ghosting and flare for improved contrast when working in bright and backlit conditions.