The Sigma 24-70mm F2.
8 DG OS HSM Art Lens has optical design that is ideal for the latest ultra-high-megapixel digital cameras.
It also features a hypersonic motor (HSM) for high-speed autofocus, optical stabilizer (OS) with powerful stabilization effect, a dust- and splash-proof mount with rubber sealing, and a metal barrel for a stable, rigid feel.