Active Track function is extremely easy to use and we wanted to test it to the max! Over a period of few weeks we managed to find 12 different objects. Aim was to see how well the phantom 4 will perform with things that vary in size and colour. As you can see in the video..some objects like the ferry boat, small kite and even another drone were out of range and in the case of tracking the phantom 3 there was not enough contrast between the drone and surrounding environment for it to distinguish it. Therefore bright-coloured balls and me running across the moors in the purple top created a successful track. However I was flying quite close to the soccer ball (its movements appeared even faster) and kicking it meant losing it out of the frame, or it was simply too fast for the drone to keep up with it. Fast and small objects will therefore be more tricky for the drone to follow. You can still operate the drone during active tracking, for instance moving it to the right and left will make the drone rotate, just like the POI (orbit) in the Phantom 3, and you can also change the altitude. The minimum distance from the subject, its size, colour and the surroundings are all factors determining how well the tracking works, but it’s a big improvement from what the Phantom 3 has to offer.