This is the Dorr 86mm UV Protect DHG Slim Filter [316086] Dorr 86mm DHG UV Filter allows only the desired light to enter the lens so your prints will be free from UV. This filter is made of Digital Highgrade Glass which is coated on both sides to ensure 99.5% light transmission. Can be left on the lens at all times to serve as a protector. ...Contact us if you need more help.