The Kenko Digital Zeta L41 UV Filter is the ultimate filter for both digital photography and film. The L41 UV filters are designed to absorb the ultraviolet rays which can often make outdoor photographs look hazy and indistinct. This multi-purpose, all-around filter can serve as a permanent lens protector. The Zeta UV L41 filter absorbs up to 410nm (wavelengths) of ultra violet rays. Normal UV glass has a slight yellow tint but the L41 is perfectly clear due to the use of high-performance glass.