What's the difference between the aperture of mobile phone camera f2.0, f2.2 and f2.4? Which one has the most light?

In the aperture model of mobile phone camera, the aperture f value = lens focal length/lens effective aperture diameter, that is, "F2.0" is equivalent to "1/2.0", where the numerator 1 is fixed. It can be seen that the smaller the number after f, the greater the amount of light entering.

Data expansion:

Aperture is a device used to control the amount of light entering the photosensitive surface of the fuselage through the lens. Usually in the camera. We use the f value to represent the aperture size.

For the manufactured lens, we can't change the diameter of the lens at will, but we can control the luminous flux of the lens by adding a polygon or circular aperture grating with variable area inside the lens. This device is called an aperture.

The function of the aperture is to determine the amount of light entering the lens. When the shutter is constant:

The smaller the value behind f, the larger the aperture, the more light entering, the brighter the picture, the narrower the focal plane and the more blurred the background of the subject;

The larger the value behind f, the smaller the aperture, the less light entering, the darker the picture, the wider the focal plane, and the clearer the front and back of the subject.