What are the functions of aperture and shutter speed in photography practice?

Aperture is a device used to control the amount of light entering the photosensitive surface of the fuselage through the lens, usually in the lens. We use the f value to represent the aperture size. The smaller the f value of the aperture, the more light enters in the same unit time, and the light quantity of the upper level is exactly twice that of the lower level. For example, if the aperture is adjusted from f8 to f5.6, the amount of light will double. We also say that the aperture is enlarged by one level. For consumer digital cameras, the aperture f value is often between f2.8-f 16.

Shutter is a device on camera to control the effective exposure time of photosensitive film. Shutter speeds range from a few minutes to thousands of seconds. Set according to the need, and cooperate with the aperture to achieve the exposure required by the photographer.

A simple metaphor, aperture, is similar to a faucet. The larger the aperture, the more water comes in. A shutter is like a container. The faster the shutter is, the longer a person can hold water in the container as long as he wants. Generally, it is necessary to just fill a basin of water, and he has to coordinate the water intake and water intake time. I don't know if you understand.