Precision Design .45x Wide Angle & 2.5X Telephoto Camera/Video Lens Set Fits Filter Sizes: 30mm, 30.5mm, 34mm, 37mm & 40.5mm Extends your Telephoto, Wide Angle &amp; Macro capabilities Will directly attach to any 37mm filter mount, and the included adapter rings will allow these lenses to be fitted to 30mm, 30.5mm, 34mm &amp; 40.5mm mounts as well.