The filters that DJI supply with the Inspire 1 are good..... for the trash can/bin but not much else.
They are VERY poor quality and non multi coated.
I wondered if anybody had tried a decent filter on the Inspire's camera like a Heliopan or Hoya Pro?
Hoya filters are on the top in the quality along with B+W >Schneider etc. I was looking for Hoya Pro ,but there filters start from 47mm ,as I remember (I own several Hoya in 77mm size ,one of the beast polarizing filters ). I thing you posted also the SRP ND8CP. I would like to try that one ( as I mentioned in another post, that filter combination is also god balancer between the sky and foreground).Another potential good filter would be Tiffin IRND ,but again that one comes in 77mm and 4x4 and is pretty pricy . To bad those filters are tempered glass ,thus impossible to cut ,to 37mm .
Now regarding the DJI filter ; I called dji asking if there filters are coated ,the respond was "I don't know" and "no", but when looking on the filter ,one side looks like coated ,but it is inside one instead of the outside one (looks like reversed orientation) .