0.42x Fish-Eye /Wide-Angle Converter for Canon XTi, XS, XSi, T1i dSLR 0.42x Wide-Angle Conversion Lens comes with a 58mm Adapter Ring to fit the CANON 18-55mm "Kit" Lens (and others) Get Wide to SUPER-Wide to FishEye effects Pro Digital Series lens with Steel Barrel construction and Multi-Coated Optics Includes Manufacturer's Lifetime Warranty