Since I have this action cam acquired mainly for diving missions, I was bitterly disappointed. Due to the curved front lens of Unterwasssergehäuses, all shots are out of focus. After I sent the product by Rollei, the problem has been acknowledged. The case is, the camera of the Chinese company AEE manufactured as. AEE has changed its underwater housing for Aktionpro s 21 plano lens some time ago. Obviously Rollei was not informed, and supplied with the unusable curved front lens. Rollei exchanged my useless UW-housing with a prototype with Planport aus.Leider the purchase for my diving holiday on Sulawesi was a letdown.