There are endless discussions of whether you need a protective filter or not. Many say no, others say that a sun visor ranges. But if after a few years then the expensive lens front looks like Grandpa's reading glasses from 1920, the actions brought loud. But it's already too late. I have at all expensive lenses be decades a protective filter on it and had not a single picture in which he interfered. For this I must of course say that I buy only high-quality filters and go until 40 Euro los. Those looking for less, need not be surprised if he has reflections and blackouts. The Hoya HD is so strong glare, then one perceives him not at all more. Absolutely high-quality workmanship and is currently probably the absolute pinnacle in the market. Even surpasses the original Canon filter.