Why mega-zooms like the P30 Pro bring us closer to danger

There are four cameras on the back of the brand-new Huawei P30 Pro. It has a standard camera; an ultra-wide lens; a "time-of-flight" camera for depth-sensing; but the one that has got us all talking is the telephoto, mega-zoom lens. Huawei calls it the Periscope lens and it's every bit a technological marvel as the critics are making it out …