The 4.35mm Lens is a new that is a direct replacement for most action cameras like the GoPro Hero.
On the GoPro it has similar depth of field as the stock lens and is sharp enough to capture 4k video while utilizing the original lens mount (no Supermount required unless you want to install internal filters). This lens is about 12 degrees wider than the popular 5.4mm lens making it optimal for many platforms, especially on a UAV. Since it does not stick out of the camera more than the stock lens it works perfectly with the waterproof housing. It is 0.5g lighter, making it perfect for use on gimbals.