To Polarize, or not to Polarize... That is the question

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Apologies but I'm still slightly confused - my fault. I use the PolarPro v2 filters. Is there any information on determining the orientation of the polarizer? On my camera filters there is often a mark on the filter rim to orientate it relative to the sun's direction to manage the amount of polarizing effect.

I haven't seen any literature or posts on something similar for the Pp filters.

I know the angle of the sunlight for video changes, particularly for aerial work, but I still want to be able to set up the filter for my preferred planned shot.

Any help much appreciated.

I have the Pp filters too. There isn't a mark on them and when I look through them and rotate, I don't see a difference. I don't use the filter because I didn't like the results. I use the lens shade that came with the GoPro (which helps A LOT!) and I set the EV comp on the GoPro. Solex makes it super easy to adjust EV comp as you fly.

EV Compensation Explained