The Kenko Step-Up Rings allow a larger filter or other accessory to attach to a lens of a certain size. A wide variety of lens-to-larger-filter or accessory combinations are available. The Kenko step up rings are made of lightweight aluminum alloy that is anodized in a black finish in order to be durable and resist corrosion. Kenko Tokina USA, Inc. is the exclusive US importer and distributor of Tokina, Hoya optical filters, Slik tripods, Kenko photo/video accessories and Daiwa broadcast camera supports. Kenko Tokina USA’s roots in California and US distribution date back to 1973. Now located in the original Surf City USA, Huntington Beach, CA we continue our commitment to our core brands while we strive to find new and exciting products to bring to our customers. For the 40 years that Kenko Tokina USA, Inc. has been in business we have grown from just introducing Tokina lenses to distributing multiple lines as we do today. We are still a small company that’s enthusiastic about photography and we enjoy bringing high-quality products and creative accessories to the photo market. Providing products that enhance your photography is our business.