1. Optical glass, precision ground and polished, provides high-definition imaging. 2. Utilizes double-sided multi-layer nano-coating technology to restore true colors. 3. Double-sided oil-repellent and waterproof, safeguarding your lens. 4. Double-sided adhesive design can be tightly fixed on the lens and will not fall off accidentally during flight. 5. Installation does not damage the original lens, allowing for easy filter changes so you won’t miss any exciting moments.