The Sigma 18-250mm f/3.5-6.3 DC Macro OS HSM Canon is a wide-angle lens with zoom feature. The lens has image stabilization, allowing you to use shutter speeds up to four stops. Because the Sigma 18-250mm is made of Thermally Stable Composite material, the lens is resistant to temperature changes. In addition to a Special Low Dispersion lens element, the Sigma 18-250mm also has three aspherical lens elements. This prevents chromatic aberrations; lens errors that cause color edges in your image.