Here is some footage with the Circular Polarizer from Polar Pro on my Phantom 4. I was shooting in 1080P 120FPS on a moderately sunny day. I am not the best colorist but the grade looks fairly close to being how it looked in-person. I am hoping for a bright sunny day tomorrow so I can get out there and test all the filters I have purchased recently. Stay tuned.
If you have any questions, feel free to ask me on Twitter @iCrizzo.
The Polar Pro filters are $49.99 on Amazon; http://amzn.to/1YSMquI.