Ultra Hard Coating: 18 layers of advanced surface coating technology. Double-sided Nano coating: 99.3% transmittance, multi nano coatings, waterproof, oil-proof, easy to clean. Protect Your Lenses: Protection against accidental drops, dust, fingerprints, dirt, scratches, sand, or seawater spray. Water White Glass: Higher purity than standard glass, with a higher light transmittance and neutral color. UHD Technology: Double-sided high-precision polishing. No loss in image sharpness even using high megapixel sensors. 8k Ultra