77mm to 52mm Step Down Ring Filter Adapter Applicable to All Brands of UV ND CPL Filter (77mm-52mm)

【1】The first number of an adapter ring is always the lens thread size,the second number is the filter size of the accessory. 【2】Special aviation aluminum alloy, high strength, impact resistance, distortion and pressure resistance. Greatly reduces the main thickness and weight. The surface is subject to high mesh mechanical sandblasting, environmental protection anodizing, and the color is pure dumb black. 【3】Compatible with all camera lenses. 【4】How do I find my filter thread size? Your lens thread size will be printed underneath your lens cap or written somewhere on the lens barrel. Please do make sure to order the correct size otherwise it will not fit on your camera lens. 【5】30-day quality assurance, worry-free returns and exchanges, please contact us if you have any questions, thank you.