Ths CPL turned out to be great. I was afraid that the green nano-coating could cast a greenish tint on the image. I haven't noticed any annoying green tinting although it does have a slightly warmer and maybe yellowish look. Nothing that can't be controlled with proper white balancing and some minor editing. I find this CPL to be really good for the money.My only issue: my lens cap seems to not fit properly over this filter. I can still use it but it falls off easily. Keep this in mind.EDIT: I'm taking a star from this because taking the filter off is a nightmare. I use a high end UV filter from B+W on my favorite lens and got this K&F cpl for that same lens. Before purchasing i asked and made sure the filter was not only stackable but good to be used over any filter, including my specific UV filter reference, and i was told, here on amazon and other sites, that it was totally fine. well, I'd love to have some of those advisors to try and take off my cpl from that B+W filter. It's like they fused together. Moreover... I had an accident yesterdayand the cpl got some mild scratches. I'm trying to take it off so i can decide whether to get a new cpl or not. Well, no matter what i try (and I've even tried the rubber band trick K&F has on youtube), its not workingLong term review: after a few days i managed to take the filter off. The scratches were minor so i kept it. I've been using it quite often ever since and now I'm super careful not to tighten it too much. Learned my lesson the last time. I still like it, but it lacks some power, specially when taking pictures of stuff in the water. It works, in the sense that with patience and a very good angle, you can see stuff under the surface, but it still leaves sone glare and reflections. When i use it on other super shiny surfaces, however, it's quite good. I know this isn't an expensive filter so i still recommend it for the money, but if you are serious about it, you'd better save some extra money and get a higher quality filter. I don't earn in dollars, so to me it's a fair steep difference between this tier of cpl (which i consider affordable and acceptable) and the next level. But i really want a better one and will eventually replace my K&F filter