Ci sono varie guide e video che spiegano nel dettaglio come sistemare e mettere a fuoco la lente della yi sport camera.
Purtroppo la quasi totalità dei lotti di vendita sono affetti da questo problema dovuto ad un controllo qualità di Xiaomi-Xiaoyi non impeccabile.
Per fortuna si sistema tutto in 10-15 minuti e tanta pazienza.
Posto qui dei video e delle guide che ne spiegano le procedure.
https://forum.dashcamtalk.com/threads/xiaomi-yi-sports-camera-focus-issue-hot-glue.10840/
GUIDA SCRITTA
so there is no “metal sides” and you can twist it by your fingers in some kind of rubbered (silicone for example) gloves. first you need to “break” thermal adhesive on 12 o’clock and then you might focus as you wish.
Use something thin to pry open the front panel (i.e. tweezers)
Once you’ve pulled the front out you can see the lens
Break the thermal adhesive typically located at 12 o’clock
Turn the lens by a small amount, make sure you are turning the sides of the lens, not touching the glass. You could use rubber / silicone gloves for this
Check the focus and continue to readjust until it the image is focused
By a XiaoMI Fan!