Built Strong. A Go-To. Building on a lens model first introduced in 2001, the Sigma 24-70mm F2.8 is built with and dust-proof and splash-proof mount with rubber sealing and a metal barrel. The 576 has three SLD (Special Low Dispersion) glass lens elements and four aspherical lens elements to help minimize optical aberrations.
Bokeh that is a cut above. At wide-open aperture, this lens offers outstanding photographic expression. The area in focus is extremely sharp, while the background exhibits a beautiful bokeh effect with only slight spherical aberration. The newly designed large hypersonic motor (HSM) offers 1.3 times the torque of its predecessor and exceptionally stable performance even at lower speeds.