GoPro Surfboard Mounts
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The best point for video capturing is from your surfboard and it can be done with the help of the GoPro Surf Hero Expansion kit. This kit also comes with a base plate for your camera that can be installed a foot from the tip of the board.
This mount will let you have a third-person view so that you can record a video of you on the board with the waves behind. But make sure that you tilt the camera at least 30-45 degrees upwards so you can get the full view of the wave.