It is an adapter for the connection between different aperture lenses of digital cameras, such as the 43mm to 55mm adapter ring. The adapter ring + light shield can make the original small digital camera look more powerful, but the digital camera is a step away from the portable. The portable digital camera with the light shield needs a larger camera bag to be attached, and it will be easier to bump. Many digital cameras used by dcfans cannot be equipped with lenses such as UV due to lens size. So there are many experts who make their own adapter ring. To add various filters or lenses, installing a suitable adapter ring is the first step. Good lenses over the years, but they can't be used with your digital camera! By reasonably selecting various adapter rings