I have the PolarPro and I'm not that happy with it. It distorts the images which then require me to fix in Lightroom, the horizons bend at the sides. The colours are also quite different. I saw some comparison video where the YouTuber recommended the Nisi over the Polarpro with accurate colour...
I will start by saying that the build quality is excellent — it is a very solid filter made from metal and glass (weight is 5.1g). The anti-reflective coating on the glass seems to be very good quality. The filter fits fairly tight onto the drone (compared with OEM filters) but it is not a...