Hi, I need some expert advice, I have a Canon 7D and the 50mm f/1.2L, 24-105mm f/4L and the 50mm f/2.5 Macro, I want to buy UV filters mainly to protect the front Lens, one option is to buy the Canon UV HAZE filters and the other one I like is the Sigma DG UV Multi Coating filters, any previous experience with those UV filters ?, any recommendation which one is better ?, thanks