Featuring Sigmas original OS (optical stabiliser) function, the 70-300 mm. F4-5.6 DG OS telephoto zoom lens is ideal for sports & wildlife photography. In fact, this lens boasts a special low-dispersion (SLD) element to effectively correct all types of aberrations & is equipped with a Super Multi-Layer coating to reduce flare & ghosting. This means that it can provide high contrast images throughout the entire focal range. Plus, with a maximum magnification ratio of 1.3. 9, this Sigma telephoto zoom lens is suitable for close-ups. CAMERAS Camera Lenses Lens for Canon.