Photos vary in size. It looks the same on the mobile phone, but it is different when it is developed. You can only tell by looking at it with a computer.

The use of dual cameras in mobile phones;

1. The focal lengths of the two cameras are different. The biggest advantage of this is that you can shoot distant objects without digital zoom to achieve the effect of object magnification.

2. The dual camera system can also achieve smoother zooming, such as digital zooming and lens switching in video recording to achieve a more natural effect.

3. Dual cameras use two independent modules and both have independent sensors, which can greatly improve the image quality even in low light environment. Not only can the noise be obviously reduced, but the whole imaging picture will be cleaner. And users can't tell whether this photo was taken by a big camera or two small cameras.

4. Under the interaction of two lenses, the system can automatically have the ability to analyze different depth of field. Although the word 3D has been over-consumed, some people disdain it, but on this basis, the functions of background blur, autofocus, augmented reality and so on can still be realized, and the effect is obvious.