Xiaomi has launched its 12S Series of smartphones in mainland China. Aiming to redefine what’s possible with mobile photography, the range-topping Ultra model features a new 1-inch Sony sensor and imaging systems co-engineered with Leica. The star of this particular show is the 12S Ultra’s rear triple-camera array. Its 48-megapixel ultra-wide module uses a Sony IMX586 image sensor that’s paired with an 8P Leica Summicron 13-120mm F2.2 aspherical lens which is designed to reduce flaring, ghosting, and chromatic aberrations. Other notable features include dual-PD autofocus and support for macro shooting. The 50.3-MP wide-angle camera is even more impressive, with Xiaomi...