Just tried my new PolarPro Cinema Vivid Series ND Filters in flight today.
Beforehand I practiced putting them on a couple of times to see how they fit. They fit well, snapping on and off.
I also tested putting them on at home and upon powering up the Mavic, the gimbal gave no error messages with the added ND filter.
I figured great, let's try it out for real now.
However, it became a whole different story in the field today...
I used the ND8 filter and made sure it was securely and uniformly attached to the camera.
But upon powering up the Mavic, I got a Gimbal Error message in DJI GO.
I restarted the Mavic several times to see what was happening.
Finally about the 3rd or 4th time starting up, I got to an initialization without having a DJI GO Gimbal Error message.
The Gimbal Error messages varied, to being:
Gimbal Overloaded, make sure the clamp is off.
Gimbal Limit reached.
Gimbal Obstructed.
Eventually I realized on the second or third startup, looking at the Mavic as it initialized and ended the startup with a gimbal error,
the camera would be left positioned at an odd, crooked angle.
My solution was to power off the Mavic, straighten the camera to a normal horizontal position and then restart the Mavic again.
Usually after doing this procedure the next startup would be without Gimbal Error messages and I would then fly with no problems.
This sequence happened the same way for two separate flights in different flight locations, using different batteries.
I confirmed the ND Filter was installed properly and uniformly, snapping on and off.
I have to assume the filter was catching on something during the startup sequence.
The only difference I can think of between being at home and in the field is the possibility
that at home the Mavic was completely level and maybe the field surface was not.
But these outdoor surfaces were not noticeably slanted, (one time on a flat boulder and the other from a concrete pad (with no rebar inside).
I've certainly taken off with the Mavic and Phantom 3 from much more uneven terrain.
While this is a disappointment, I will say I was pleased with the look of the video(s) using the ND filter.
However at this point I'm not sure what to do...
I'm thinking of returning them and trying out the new DJI filters or Taco at this point.
Getting a gimbal error message so frequently on startup is not workable.
Anyone else having issues, or have comments?