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