Model Name: UV / MC-UV Lens Material: Optical Glass Frame Material: Aluminum Alloy Number of Coating Layers: UV: Double Layers; MC-UV: Multiple Layers Frame Thickness: 4mm Light Transmittance: UV: 93; MC-UV: 98 Lens Hardness: 9HD Applicable Aperture: Multiple aperture models, selected according to the lens size Filter Functions: ① Filters ultraviolet rays and stray light to present more realistic colors; ② Prevents dust, oil stains, and fingerprints from directly contacting the lens, effectively protecting the lens.