The H&Y RevoRing is a true first in the image-making world. Its revolutionary design overcomes the need for multiple filters and step-up rings, saving photographers and filmmakers both time and money. The H&Y RevoRing is a completely new type of filter adapter. With its patent-pending variable and tough retractable blade technology, it can fit any lens with filter thread sizes between 37 - 49mm, accommodating either 52mm screw-in filters, respectively. This versatility removes any need for photographers, cinematographers and content creators to carry multiple step-up/step-down rings, which can make for messy kit bags, adding unnecessary weight and slowing down the creative process. Key to the H&Y RevoRing's unique design is its innovative, retractable & variable diaphragm. This precision-engineered feature allows the H&Y RevoRing to make 1 filter instantly attachable to multiple lenses, and with 4 size options, filter thread sizes from 37mm through to 95mm are all covered. The H&Y RevoRing has been manufactured entirely from architectural building-grade 6063 aluminum, making it incredibly strong and lightweight. Finished in a matte black anodized coating, further protecting it from adverse weather conditions, the H&Y RevoRing is truly a "go-anywhere" solution that will serve for years to come.