The Raynox HD-6600PRO-37 Wide Angle Conversion Lens is designed to fit onto lenses with a 37mm filter thread. Providing 0.66x magnification this wide angle conversion lens helps you capture beautiful landscapes, large groups, and tight spaces. Utilizing the 72mm front thread, filters can be added for obtaining the just the look you desire. Touted by Raynox to be distortion free (-1.3%), the HD-6600PRO-37 has a 3 element/3 group construction. Featuring a high-resolution optical design that delivers 350 lines/mm, the lens also boasts an anti-reflective coating for enhanced light transmission.