A UV filter adds an extra layer of glass between the camera lens and digital sensor. This can reduce the amount of light that passes into a camera by 0.5% to 5%, ...

UV-C Self-Cleaning Technology Gains Momentum as UVBrite Enhances Sustainable, Filter-Free Hydration for Health-Conscious and ...

- The "UV 400" standard ensures 100% filtration of UV rays up to 400 nm. - Sunglasses are categorized from 0 (light tint) to 4 (very dark tint). For the sea or mountains, category 3 is recommended.