With the Gradient Collection from PolarPro’s Cinema Series for the DJI Mavic 2 Pro Drone you create a perfect exposure balance between the sky and the ground. Normally the air is about 2-3 stops lighter than the ground. That is why it is difficult to properly illuminate both the sky and the ground. With these drone ND filters, that problem is a thing of the past. The Gradient Collection consists of 3 ND filters, each with their own specialty.