What is the difference between Xiaomi's current 50x periscope zoom and 120x digital zoom?

Periscope zoom is similar to fixed focus, and there is a distance interval before it takes effect.

Although periscope zoom camera can increase the ability of magnifying objects more effectively than digital zoom camera, it also brings some limitations. The biggest challenge of periscope telephoto camera is that although it allows you to zoom in on distant objects freely or observe tiny objects at close range, its zoom ability is fixed at a certain value. The space inside the lens is limited, so the lens array can't move too much. This movement can only facilitate autofocus, not zoom in and out. Therefore, it can't let you zoom in or out at will like moving the zoom lens on a digital SLR camera.

The zoom lens of periscope is mostly rectangular or rectangular, which needs too much light to reflect the clarity of the photo, and it also has certain advantages when shooting macro.

120x digital zoom

Digital zoom can enlarge the object beyond the fixed focal length range defined by periscope, which is also the chip's synthetic imaging through graphic image calculation, and the more enlarged it is, the more blurred it becomes. At present, mobile phone manufacturers try to combine digital zoom and optical zoom into hybrid zoom.

The telephoto lens is a circular lighting hole. At present, better mobile phones use macro lenses and optical lenses to make up for the shortcomings of digital synthetic imaging.