This triple-lens phone may come with 3D-sensing rear camera

It is not clear, however, whether the three cameras will all be used strictly for photographic purposes, like on Huawei's P20 Pro, or the rumored depth measuring time-of-flight (ToF) duties, like the 3D face-reading kits on the front of phones like the iPhone X or Find X. What could a ToF camera do at the back? Well, create augmented reality experiences, like trying on new clothes in the virtual domain, or rearranging the furniture, but let's not get ahead of ourselves, as all will be revealed next week when the Pro will get official. 

Meanwhile, one of the lenses is said to sport a variable aperture, like on the Galaxy S9, and with exactly the same f/1.5-f/2.4 specs. In addition, the Oppo R17 Pro should be one of the few announced with Qualcomm's upper midrange Snapdragon 710, which should help keep the pricing decent and the performance high up there with the big boys.

source: Oppo