This lens mount adapter allows lens become a Marco lens on camera body. Therefore， you don't need to buy any Marco lens. Although the lens will fit physically， automatic diaphragm， auto-focusing， or any other functions will not operate correctly while using this adapter. Reverse ring allows you to mount two lens front to front via filter thread for extreme macro close-up photography. Reversing the lens greatly increases the macro reproduction capabilities.                                    Features            Brand new and high quality Macro Reversing Mount Ring Filter Adapter<br> Using lenses and filters is a great way to enhance your photographic experience<br> With anodized aluminum alloy construction， the filter adapter ring is hardness， light weight and durable<br> The adapter ring for convert the larger filters to smaller lens<br> It's a must have for the serious photographer<br> This is an original product<br>External diameter: 58mm<br>Internal diameter: 55mm<br>                                                                                                Package Includes            1 x Male 55mm-58mm Macro Reverse Ring<br>                                                            Extra Info            Compatibility: Access a wider variaty of filters， adapters， hoods and more<br>