Sigma 10-20mm f/3.5 EX DC HSM Autofocus Zoom Lens for Canon Cameras 9PC Bundle. Includes Manufacturer Accessories + 3PC Filter Kit (UV-CPL-FLD) + Cap Keeper + Microfiber Cleaning Cloth Zoom Super Wide Angle 2 Extraordinary Low Dispersion Glass Elements & 1 Special Low Dispersion Glass Element 4 Aspherical Lenses Maximum Aperture: f/3.5