High-quality UV Protective Filter made from durable Schott B270 glass Impressive light transmission rate of up to 99.4% for clearer, sharper images Lightweight Aviation Aluminum frame with a 3.1mm ultra-thin design 24-layer coating to reduce reflection and increase light transmittance Dual protection with double-sided waterproof and oil-proof features Enhances image quality and clarity, adding brilliance to your photography journey