Sigma’s F2.8/24-70mm IF EX DG HSM lens offers first rate image quality in a lightweight and affordable body. Designed for use with full frame and APS-C sensor digital SLRs, as well as 35mm film cameras, this fixed aperture zoom exhibits consistently high detail resolution at all focal lengths and performs well right across the image frame – essential in a full frame lens. The Hypersonic Motor (HSM) boosts the camera’s own autofocusing system, to ensure fast reactions and that subjects are focused and tracked quickly, while high refractive index glasses in three elements allow a compact design and well controlled chromatic aberrations, even at the corners of the frame. Covering an extremely useful range of focal lengths, the Sigma 24-70mm f/2.8 IF EX DG HSM is an excellent lens for the professional and high end amateur alike.