Occasionally the tolerances of the Mavic camera and our filters are on opposite ends, creating a very tight fit. If you think the filters are much too tight, please contact us and we'll be happy to send out a new set.
Our filters are well below the weight of what the gimbals can handle. We stress-test each filter model, finding a maximum weight each gimbal can support for 300 flights. We then make sure our filter's weight is 1/4 of that maximum weight, guarenteeing they will work perfect.
The Phantom 3 and Phantom 4 filters share the same diameter and thread pitch. The Phantom 4 has a longer lens, making them a bit longer than that of the Phantom 3. The filters can be interchanged, however the filters will not sit flush on the lens barrel.
Generally the choice of a specific filter is up to the user looking to obtain a specific look and feel. However, the chart below is a good starting point for those looking to see what filter works best in certain situations.