About this item: * The lens is made of top Japanese optical glass, and the lens is coated with 28 layers of nano-coating on both sides, which is waterproof, oil-proof, scratch-proof, and anti-fog. The lens adopts grinding and polishing technology on both sides to ensure ultra-high-definition, and the sharpness of the image is not damaged. * The frame adopts self-locking technology, which is infinitely rotated by 2-6 steps, which is convenient for light reduction and positioning, and at the same time avoids the phenomenon of black crosses. The frame is equipped with a push rod, which is convenient for customers to adjust the gear size. For users who shoot video, it is helpful to automatically adjust the light reduction gear through auxiliary tools. * The surface of the frame is designed with CNC trapezoidal pattern to ensure that consumers increase friction in a large area when rotating, and install/remove lenses and other accessories anytime and anywhere. * The surface is treated with oxidation sandblasting, which can effectively avoid the entry of stray light to the greatest extent, and is used to reduce reflection. * The product is equipped with a storage bag, which is convenient for customers to store when going out for shooting. The side pull structure follows the design style of the square storage bag, which is easy to take out.