DF 49-52mm 49MM to 52MM Step Up Camera Lens Filter Ring Stepping Adapter Black This ring will allow you to mount 52mm filter, hood or lens on a 49mm lenses or cameras Change the filter or adapter or lens or other size from big to small Convenient and easy to use, 49mm attaches to the side of the camera and 52mm to the side of the lens The male (To the side of the camera): 49mm The female (To the side of lens): 52mm