What does Apple's four-in-one camera lens do?

The first thing to know is that these lenses are additional mirrors (filters), which are installed on the basis of the original lenses.

I don't know which four models you are talking about, so I will introduce some common mobile phone filters.

Wide-angle lens: increasing the shooting angle on the basis of the original shooting range, simply speaking, shooting more (peripheral) things.

Fish-eye glasses: The special wide angle will distort the photo and highlight the middle.

Macro lens: usually a part of a wide-angle lens, used to shoot objects closer than the nearest focal length.

Telephoto lens: telephoto effect, which can magnify distant objects without losing image quality.

Polarizer: It filters out all the light in a certain spectrum and is used for landscape photography. Its function is generally to eliminate reflection, enhance the blue effect of the sky and slightly reduce the light.

Pure hand tour, hope to adopt.