https://www.cnet.com/news/iphone-xr-camera-heres-how-we-think-it-will-work/ > That looks like plenty of common ground. Both phones also share the same computational photography pipeline, using the A12 Bionic chip and the image signal processor. > But the big difference is that the XS and XS Max have an additional 12-megapixel f2.4 camera at the back, which is used for 2x optical zoom. It's also an important part of portrait mode, as that telephoto lens helps create a depth map that determines where your subject is in relation to the background.