This Sigma 120-400mm f/4.5-5.6 DG OS HSM APO Lens is compatible with Canon EOS mount DSLRs; it's an ultra telephoto zoom lens ideal for nature/outdoor or sports photography. It has a minimum focusing distance of 59.1" (150cm) throughout the entire zoom range and has a maximum magnification of 1:4.2 making it useful for close-up photography.

The OS (Optical Stabilizer) system minimizes image blur caused by camera shake, and offers the equivalent of shooting at a shutter speed 3-4 stops faster. This allows handheld telephoto zoom shooting even in poorly lit conditions.

The use of the OS (Optical Stabilizer) system, HSM (Hyper Sonic Motor), APO apochromatic design, three elements of SLD (Special Low Dispersion) glass, and multicoated optics all enable this lens to provide a high level of performance throughout its entire zoom range, as well as versatility. A rear focus system insures quick, convenient manual focus and a non-rotating front barrel.