Professionals say that the easiest way to take better pictures and video is to have great filters. ND filters are great because they will help blur out some of the video when in motion. Circular Polarizers are great to bring out the vibrant colors of the sky, water, etc. I am selling my like-new Drone World variable lens filters. Unlike traditional ND filters, these filters twist so you can adjust the amount of neutral density ND2-ND400 range. Like most professional circular polarizers, the lens twists as well for adjustment. I used this once but simply don't need these because I have more filters than I need. Additional information from the manufacturer is here: Phantom 3 Variable Lens Filters (Circular Polarizer & Neutral Density) This set comes with 2 filters + nice white case that will well protect your filters. Retail price is $99. Yours for $60 shipped CONUS.