As with all previous Mate flagships, lenses are provided by Leica, and it looks like the main camera will also feature 5X optical zoom. The high-resolution render also reveals Leica Vario-Summilux-H 1:1.6-3.4/16-125mm ASPH specs and the return of the emerald green color option. No sign of fingerprint sensor on the back, so an in-display implementation looks to be the case.
https://www.notebookcheck.net/Leaked-Huawei-Mate-30-render-reveals-circular-rear-quad-camera-setup.426971.0.html