The H&Y RevoRing is a true first in the world of image making. Its revolutionary design eliminates the need for multiple filters and step-up rings, saving photographers and filmmakers time and money. The H&Y RevoRing is a completely new type of filter adapter. With its patent-pending variable and robust retractable blade technology, it fits any lens with filter thread sizes between 37-49mm, 46-62mm and 67-82mm, with 52mm, 67mm and 82mm screw-in filters respectively. This versatility eliminates any need for photographers, cinematographers and content creators to carry multiple step-up/step-down rings. Messy kit bags, unnecessary weight required and slows down the creative process. The key to the H&Y RevoRing's unique design is its innovative, retractable and variable diaphragm. This precision-engineered feature allows the H&Y RevoRing to instantly attach 1 filter to multiple lenses, and with 4 size options, filter thread sizes from 37mm to 95mm are covered. The H&Y RevoRing has been constructed entirely from architectural 6063 aluminum, making it incredibly strong and lightweight. With a matte black anodized coating to protect it from adverse weather conditions, the H&Y RevoRing is truly a "go anywhere" solution that will serve for years to come.