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GoPro Tip #134 iPhone 6 vs. GoPro - video quality test (4K)

GoPro Tip #58 Sharpness test 1080p vs 2,7k (4K)

GoPro Tip #13 60fps vs 120fps, best slow motion mode (4K)

GoPro Tip #77 Which is the fastest way to transfer files (4K)