We used a GoPro Hero 4 Silver to film our underwater footage. It was very easy to create clear shots that we could then edit to create the dramatic scene.
The rest of our filming was shot on a Canon EOS 600D DSLR camera. The settings allowed us to change the shutter speed and alter the exposure and aperture, as well as the focus to create professional looking footage. We set the shutter speed to 50, which was around double the frames per second (24) as this is the recommended setting to create cinematic footage.
We used a tripod to stabilise some of the footage in order to create a contrast to the handheld footage.