No I use no filters at all. Just a straight lens. I used to use a polarizer for awhile but with 24MM it was a bit wide and you got the uneven sky effects. I have not used it on my 35MM yet.
Allot of people throw UV filters on their lens just to protect it from harm but for one I have never had anything impact my lens before and I don't like the idea of buying 1300 dollar lenses only to throw some cheap 20 dollar pair of glass over it.
