I have had this filter a few weeks and have had fun with it. It works great to enhance the reflections in your images to yellow, blue or a mix of yellow and blue.The only reason I didn't give it 5 stars is that I was seeing some chromatic aberration in the shots where leaves are meeting a bright sky. It only seemed to happen in really bright situations. I found that many times it made the sky an amazing blue.I tried it against Fall leaves but there wasn't much affect, it was then that I realized it's going to affect reflections. When you shoot a car the windshields will turn colors, when you shoot a wet road that will turn. I can't wait to try it on a sunset with water.It's a fun filter and very easy to work with. Great for adding some interest to landscapes.