The following UV370-- ultraviolet absorption optical glass coating uv main features: Raw materials: ultraviolet optical glass optical properties Color: optical flat flatness the better the lens itself color reduction The surface of the glass: parallelism and aperture have reached the top standard Antireflection film: double-sided multi-layer + waterproof original "U" type coating Black: black lens edge circle reduce the stray light Very low reflection: through rate ≥ 99.2% ≤ 0.3% reflectivity High quality mirror ring: milling flower frame matte black optical grade oxidation