Durable - Aluminum alloy frame, CNC precise processing, screw tight installation, quick and convenient disassembly. Lens Protect Filter - Multilayer nano coating process, the lens has waterproof, oil proof, , and anti scratch performance to protect the lens from dust and scratches. Photography Filter - Lens can make the captured picture soft and rounded. Its refraction and diffusion are widely used in photography and post processing production. Portrait Photography - When shooting people, you can modify the details of blemishes and spots, make the skin smooth and delicate, and beautify the people. Scenery Photography - When shooting scenery, increase the atmospheric perspective effect of the picture, make the distant scene produce subtle effects, and make the scenery more beautiful and .