The Sigma 100-400mm f/5-6.3 DG OS HSM Contemporary Lens for Sigma SA promises clear and vibrant photographs. It fulfils this promise by incorporating four Special Low Dispersion (SLD) elements in the lens design. Additionally, a multi-layered coating is applied to the lens for reducing lens flares and ghosting effects. The integrated Hyper Sonic Motor (HSM) offers noiseless and smooth auto-focusing. There is a manual mode that allows you to use the lens by focusing the lens rings. The optical stabilizer function lets to click clear photographs by reducing camera shake. This Sigma lens has a compact and lightweight design that makes it perfect for handheld photography. The lens supports Sigma SA-mount cameras.