H&Y's REVORING is the most advanced stepped ring adapter that turns the common knowledge of stepped rings for camera lenses on its head. With its innovative and cleverly designed variable blade technology, REVORING allows you to use one filter for multiple lenses, eliminating the need for multiple step rings. It's so easy to use, many people say so. "Why hasn't this been available before?" H&Y is proud to have developed this adjustable step ring to meet so many needs.