Oppo announced a slim optical zoom lens for their next mobile phone. Optical zoom changes the focal length between the lens and the optical sensor. normally this distance makes the product thicker. Oppo uses a prisma to create a 90 degree angle like in a periscope. This technique to make the products slimmer was already used in the 360 camera’s like Ricoh https://theta360.com/en/ But Oppo was able to put it in a 5.7mm thick package and add optical zoom. We are looking forward to see and test it when it comes to the market.