Is it necessary to buy a wide-angle lens for mobile phones?

For economic reasons, many people can't afford a SLR, but want to learn photography. The viewing angle of the mobile phone is 70-80 degrees, which is a small wide angle. Adding an external wide-angle lens, such as orea 0.45x wide-angle lens, can make the viewing angle of the mobile phone reach 1 16 degrees, which greatly increases the field of vision.

In addition, many people already have a SLR, but the SLR is bulky, bulky and inconvenient to carry, and they will also buy an external wide angle to expand the camera performance of the mobile phone.