My brother had filters on every lens he gave me, so I thought that was the way to go. After buying really cheap ones from RITZ for years, I joined the forum and now I only put expensive filters on my lenses if I need them. I don't have a filter on my 24-70L most of the time, but when I need one, I use Hoya and B+W multicoated. I just got my 70-200 f4, and I didn't get a filter for it, so I'm going to order one.

