Kenko UV Sl-39 55mm filter

A UV filter is a ring with tempered glass inside, which inhibits the effect of UV radiation. In the past, this filter was often applied to analog cameras, as these models were very sensitive to this radiation. With the advent of the digital camera, the sensors have been adapted in such a way that they are hardly sensitive to this radiation. At high altitudes, however, this filter offers protection against the blue haze that accompanies the influence of UV radiation. At sea level, however, the influence of this filter is very limited. In the modern era, the filters are mainly used to protect the lens from drops or bumps.