This may be confusing as I'm having a hard time trying to find the words to explain it. Haha. A friend of mine's uncle has a Canon, not sure of the lens size but it was pretty big. Anyway, on the end of the lens he had a large shield which he explained "makes sure no sun strikes the lens." It probably extended a good 3-4" past the lens. It attached to the end of the lens and was square shaped extending outward. Anyone know where I can find one of these? I don't even know what they're called.