Review on Enhance Your GoPro Footage with CamKix Cinematic Filter Pack: Compatible with GoPro Hero 4 and 3+ - Includes ND Filters (ND2/ND4/ND8/ND16), UV Filter, and Cleaning Cloth by Fred Novak

Let me start by saying that I have a Bachelor of Arts degree in Photography so I have an idea. As other reviewers have said, the lenses fit very well. Not many chances to fall. This is where the benefits of this product end. I tested them with and without the drone and shot the same sequence with and without the ND8 filter. I set the camera's exposure to match the light conditions and did some situational testing. I was only able to do one test and quickly found that they are completely useless for high quality images/videos. These lenses shoot as quietly as shooting through a screen door. I will return them and find better ND filters.