I used these filters on my Parrott Anafi, they work fine. However, I wish there were some instructions on actually placing the polarizer effect. There is a very small white dot on the filter lens frame and I tried rotating the filter for best effect. First I put a white dot on the top and recently on the bottom of the lens, this works best. I use the ND32/PL on sunny days and it allows me to shoot in Pro film mode at 1/45 or 1/60. I didn't notice any color changing effect. I give them 4 stars for the lack of information/documentation.
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