As mentioned before, they are compatible. The only thing to keep in mind that they P4 gimbal guard may not fit (try it first) with the filters you have. If it indeed doesn't fit then you can look at replacing it with the PolarPro Lens cover/gimbal guard instead.
Our filters have slight differences. The camera barrel on the P4 is slightly longer, so we made a new filter for the P4 that fits perfectly flush. The P3 filters will work and thread on, however there will be a small gap between the camera and the end of the filter.
Let me know if you have any other questions!
Jeff
I bought a new gimbal lock from dji and cut off the front face which allows for the length of the polar pro filters. It still cradles the camera firm and I don't have to take the filters on and off.
The main reason you would not want to stack filters is the added weight. It would be too heavy for the Gimbal. We make single element ND/PL combo filters for that reason, they are same weight as the single filters to ensure smooth gimbal operation.
Jeff
Thanks.
I'm not sure which set should I go for.
The cinema vivid look more suitable for me because its with pl but I doubt nd16 would be enough for our summery sun..
Is the a possibility to mix from the two sets?
Thanks.