1. Resin construction with dual-sided multi-layer coating enhances light transmission, reduces reflectivity, and ensures outstanding image reproduction without distortion 2. Aluminum frame offers robust durability, wear resistance, and corrosion protection 3. Dual-layer coating eliminates dark corners and effectively minimizes surface reflections 4. Prevents overexposure when capturing misty water scenes 5. ND filters reduce light intake, lower shutter speeds to prevent overexposure, and block scattered light to enhance color saturation. Ideal for capturing flowing clouds, silky waterfalls, and deserted streets—commonly used in street photography, landscapes, scenic spots, and creative shoots 6. Lens material: resin 7. Frame material: aluminum alloy 8. Compatible lens mounts: 37mm40.5mm43mm 9. Note: actual product corresponds to the model listed in the title. Images are for illustrative purposes only. Proper lens cleaning procedure: 1. Blow away dust from the lens surface 2. Gently brush the lens surface with a clean, soft-bristled brush 3. Wipe gently with a microfiber lens cleaning cloth 4. Store in a dedicated case when not in use