Review on Enhanced Air 2S Drone Compatibility: Freewell Variable VND Filter covering 2-5 Stops and 6-9 Stops by Nick Cleary

Exactly what you expect from Freewell! Excellent quality. I bought these to replace my set of 8 Freewell 4K series batteries. I just wish I knew sooner. This is much more convenient and you can leave the 2-5 stop filter on in all but the brightest conditions. Less handling of the gimbal is a good thing. You don't get polarization with these filters, but I found polarizing with an 8-Pak on a drone quite awkward - too much fiddling. When post-processing photos or videos, I would prefer to increase the color saturation. The filters are well made, with no defects on the glass and no vignetting in images or videos. It's a little difficult to rotate the lens to get to the desired stop. I therefore suggest that you do this with the drone powered off to minimize gimbal issues. Also remember that the stops refer to specific ND settings, but the numbers do not match. On the first filter 2=ND4, 3=ND8, 4=ND16, 5=ND32. On the second filter 6=ND64, 7=ND128, 8=ND256, 9=ND512. I don't expect much need for a second filter, but it's good to have one just in case. It would be nice to be able to buy just a 2-5 stop filter for less money.