Sigma 18-250mm f3.5-6.3 DC MACRO OS HSM for Canon Digital SLR Cameras + Deluxe Accessory Kit equipped with Super Multi-Layer Coating to reduce flare and ghosting Hyper Sonic Motor (HSM) to ensure fast and quiet auto-focusing The lens features a brass-made bayonet mount applied on the surface to reinforce strength for long-term use and enable high accuracy and solidity. High performance & compact with great zoom ratio Made with Thermally Stable Composite material