Negative Positive
Title: Good to avoid scratches on my pricey lens
Review: In the forever debate over whether to have a filter or not I choose filter. I know that a hood is going to protect the glass as well but this can also protect. I've been one of those people that have managed to seriously gash my lens on my Canon Powershot point and shoot and got a little scratch on my Sigma 17-70mm recently. No clue how these happened but I do know that when it comes to my Canon 70-200 I'm not taking many chances.For this filter specifically I will say that I haven't seen any degradation or problems during normal use. The one thing I have seen is lens flare. Shooting with this during concerts or towards the sun definitely can give extra flare. If I'm shooting towards lights, filter off, if I'm really worried about picture quality (possible future large prints), filter off (just to be sure I don't lose anything), all the other times, filter on.
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