Who has used the external lens of mobile phone? Is it useful? What's the effect?

There are three kinds of external lenses for mobile phones: wide-angle, close-range and fisheye. The following is how to realize the external lens of mobile phone:

The wide angle consists of macro and a front lens group, and the smallest is macro. It will only be useful if you are close to the object, because the mobile phone is close to the object and full of flowers. The biggest thing is the fisheye lens. Let's look at their imaging.

Macro group:

Fisheye group:

Wide-angle group: the effect of installing a wide angle is very strong in space and the scope is expanded.

Advantages of external lens of mobile phone

1, the portability is above average, and the installation and use method is suitable for people who don't need a mobile phone case;

2. Distortion and dark angle of wide-angle and telephoto lenses are well controlled;

3. Non-dual-camera mobile phone users can better take portraits and close-up photos with telephoto lenses;

4, bayonet support front lens, with wide-angle lens is more suitable for self-timer.

Insufficient external lens of mobile phone

1, people wearing mobile phone cases will be more troublesome to use;

2. Compared with the lens, the bayonet works in general and looks cheap;

3. The telephoto lens cannot be fully focused in the distant scene;

4.iPhone 7 Plus users can't use the sub-camera after installing the lens (of course, this is a problem with all external lenses at present).