Oh, and if you choose to use a filter, be careful what you choose: some lenses such as the 24-70 2.8 ii have a curved (convex)front element so only some filters will work without scratch the glass. These buggers get scratched all the time, just ask Cicala over at lense rentals. http://www.lensrentals.com/blog/2013/10/bad-times-with-bad-filters
