58mm High Definition Telephoto Lens for Sigma 70-300mm F4-5.6 DG Macro 2.2x Ultra High Power Telephoto Converter, 58 mm Telephoto Lens, 58mm Lens Pro series 2.2x High Definition AF Telephoto Lens - NEW Fits Perfectly On To Lens - No Adapters Required High-Transparency Optical Glass High Quality Aluminum Barrel Lifetime Limited Warranty