Unfortunately, I found the CPL filter a big disappointment. I know others will disagree with me, but I felt it was too difficult to adjust. It clearly is a great idea and very much-needed–but adjusting it proves too difficult. Basically you have to have the camera in the position where you can see the result on the screen and place and replace the filter repeatedly using your fingers to manually move the filter around in different positions while you try to determine what the correct setting is. This is far too difficult to accomplish and for me, impossible to accomplish with the camera attached to the windshield. I decided that since I could not adjust the filter properly I would just remove it and not use it on the camera. They need to make it easier to adjust the proper setting for the polarizer. Also, it should be free with camera.