There are also much easier to clean. Fingerprints wipe off very easily. Within the Hoya line, I highly recommend the HD filters.
This is very interesting. I've got two of the Hoya Pro1 Digital filters and have noticed they are a massive challenge to get clean. I just end moving the oily smear around the glass and never really get rid of it. I always thought it was just my lens cloths or my technique. Good to know.
same here, it was PITA to clean the Hoya UV Pro 1
in my opinion, I think that B+W nano coated filters were the easiest to clean