Here is one from Nauticam showing off a brag reel featuring the Panasonic NA-GX7 & Nauticam Wet Wide Lens WWL-1.
This is a showreel of content captured with the Nauticam NA-GX7 for the Panasonic GX7, the Panasonic 14-42mm PZ lens, and all new Nauticam Wet-Wide Lens (WWL-1).
The WWL-1 is a real gem of innovation and is designed to work with everything from full-frame sensors, m4/3's, and smaller 1 inch compact sensors. It offers an approximate 130 degree field of view in water, superior edge to edge corner sharpness, and a very close minimum focus distance.
You can find out more at: