50x optical zoom?
This article's distinctly lacking in any technical details, so I went and had a rummage. According to T3, the P30 Pro has 5x optical zoom and a 10x "hybrid" zoom which uses "AI"[*] interpolation. And they're doing two more things to try and improve image quality:
1) Bumping the main camera up to 40mp
2) Using an "RYYB" (Red, Yellow, Yellow, Blue) - allegedly, the two "yellow" sensors pick up more light and can also detect both red and green
https://www.t3.com/news/huawei-p30-pro-review
However, there's no mention anywhere of a 50x zoom, even though it is mentioned in one of the powerpoint slides visible in one of this article's photos. Forbes also states it's 10x.
https://www.forbes.com/sites/bensin/2019/03/26/huawei-p30-pro-hands-on-10x-optical-zoom-beats-apples-and-samsungs-top-offerings/
Either way, it'll be interesting to see how well these things work once the phone is out in the wild.
[*] Surely we must have reached the peak of tagging everything which uses an algorithm as "AI"?