They're here... DJI release ND filters for the Mavic at a fraction of the cost of others. Only $35 already ordered my set.

https://m.dji.com/product/mavic-nd-filters-set

I ordered a set as well.  I can't find any reviews or videos.  Have you seen anything?

http://forum.dji.com/thread-80107-1-1.html please see attached thread no need for a new post.

does having the ND filter on affect the gimbal calibration? and is it safe to leave on when transporting?

stuey-86 Posted at 2017-1-20 09:32
does having the ND filter on affect the gimbal calibration? and is it safe to leave on when transporting?

Please see the link above as its more active.