New Version 5.0 Firmware for GoPro HERO4 - Linear FOV vs Medium FOV Comparison - YouTube
Hero 4 firmware updated to v5.00 : r/gopro
GoPro HERO4 Black VIDEO & PHOTO Specs: Resolutions, Framerates & Shooting Modes
Amazon.com : DJI Osmo Action 4 Adventure Combo - 4K/120fps Waterproof Action Camera with a 1/1.3-Inch Sensor, 10-bit & D-Log M Color Performance, Up to 7.5 h with 3 Batteries, Outdoor Camera