After unpacking I discovered on the glass exterior (screw side) a little hair. Have the hair removed with a photo-dust brush from the glass. Although I have barely touched the glass appear to colored streaks on the glass. Try this to beeithen with a microfiber cloth made the whole thing worse. Ultimately, I was able to get the glass with difficulty and use of Zeiss cleaning clean again. Why an expensive product so must be supplied with a so-sensitive (superfluous?) Coating? Optically and mechanically, there are no complaints! One can even vorschrauben the polarizing filter before the UV / protection filter, but be careful that works at the EF 24-105 at full size (EOS 6D) until 30mm.
