Garmin virb ultra 30 VS GoPro hero5 black vs Xiaomi YI 4k, test a confronto HD

1-Xiaomi YI 4k: Test: https://drive.google.com/drive/folders/0B48owrQbxqQBbFllZXRQR2xCZmc?usp=sharing Scheda tecnica: https://www.youtube.com/watch?v=yjbVqYFJees 3-GoPro hero5 black: Test: https://drive.google.com/drive/folders/0B48owrQbxqQBRkRtM1ZSeVo1cTg?usp=sharing Scheda tecnica: https://www.youtube.com/watch?v=yx8sLLp__YI 2-Garmin virb ultra 30: Test: https://drive.google.com/drive/folders/0B48owrQbxqQBTVZZUXN5ank3N1U?usp=sharing Scheda tecnica: https://www.youtube.com/watch?v=KeNzlcDxTuU Reflex e Mirrorless: https://www.youtube.com/playlist?list=PLPpqRn-1R6N5AIj_ctciMKvwwHB7f3vW- Action cam: https://www.youtube.com/playlist?list=PLPpqRn-1R6N7Lx8bvmamsR1kjnJ4nF8Dg Smartphone: https://www.youtube.com/playlist?list=PLPpqRn-1R6N55f9i59V9M8w1MwgFpda8e Facebook: https://www.facebook.com/recordhdtech/