For grins, I decided to see how much of a difference this cheap CP filter (thrown in for free with a different lens purchase) would make to an image. Truth be told, I had used it many times before on my ultra wide angle lens and with that type of lens there is so much compression that I never really noticed and degradation. However, on a regular lens... WOW! No editing, straight from the raw file.
I think you can tell which bands are which.
I think you can tell which bands are which.