I know there are a few other reviews that talk about this filter creating spots on the lens. I concur with those reviews. I've used this with my 35mm prime lens, and have gotten to the point where I just take it off before shooting, as most of my shots would come out with a green spot/tint. I still keep it on for when I carry the lens around just as added protection, but I doubt I'll even do that for long, as it gets tedious taking the filter on and off.I got this free with the lens, but even so I still feel a bit ripped off.