Why does Huawei Glory 20i rear three cameras only have one lens?

Because the three cameras of the mobile phone are not turned on at the same time, the three cameras have their own functions. When taking pictures normally, the lower camera works and the upper camera is a wide-angle camera.

Wide-angle lens, also called short-focus lens, is named because its viewing angle is larger than that of standard lens. The focal length of a wide-angle lens is smaller than the diagonal length of the film. According to the different functions of the focal length, it can be divided into ordinary wide-angle, super wide-angle and fisheye lens.