Vivitar High Definition 2.2× 58mm Telephoto Conversion Lens – Japan Optics – Cap
Serial 10910113 – 58mm Front Screw-On – For Lenses With 58mm Filter Thread. Magnification: 2.2×. 2.2× magnification for extra reach; attaches to 58 mm filter thread. Designed as a front conversion lens; uses the host lens for AF and aperture.