Folks - Still quite new to this and on a steep learning curve! I have been using Polar Pro ND 8 & 16 with slow shutter speeds for cinematic video. I have noticed that very often trees or grass can appear blurred or like watercolour paint while the rest of the footage is in focus. Yesterday I did some comparison footage without the ND at around 1/1000 s and the green areas are in perfect focus. Does that sound right?