1,camera UV filter 2,ultra-thin ( 1.1mm) 3,transmittance (99.5% ) 4,scratch resistance 5,fingerprit resistance DSLR UV filter1,camera UV filter2,ultra-thin ( 1.1mm)3,transmittance (99.5% )4,scratch resistance5,fingerprit resistance6, double-side coating ,when you finger touched the mirror and leave the fingerprint on it , or the sweat rid off on the mirror , you just use a dry piece cloth or shot ...