【Compatible with】 Compatiable For To the side of the lens:77mm (All Brands Ø77mm),To the side of the filter thread:72mm (All Brands Ø72mm). Your lens thread size will be printed underneath your lens cap or written somewhere on the lens barrel. Make sure you order the correct size otherwise it will not fit your lens. | 【High Quality】CNC MACHINED ADAPTER RING: We manufacture this step-up ring with and then apply a matte black electroplated finish, which withstands corrosion and other abrasive elements often encountered in outdoor photography. | 【Product Description】:The first number of an adapter ring is always the lens thread size, the second number is the filter size of the accessory. If the first number is bigger, it's a step-down ring What is a step up ring? Step up rings, also known as adaptor rings, allow you to use filters and accessories that are not the same size as your cameras lens. Lenses aND UV CPL come in a large range of types and sizes and unfortunately they don't always fit together correctly. | 【Note】 Dedicated to provide products in high quality & good price. Made of metal sealing ring, much tighter. Laser fonts, much durable Meet.