Focus the camera

The focus of photography is the focus, and the popular explanation is to choose the clearest point of the image.

For example, in a scene, some objects are far away from the lens and some objects are close to the lens. Choosing the focus is to choose which object to shoot clearly.

For example, people see things. When you look at the computer screen, the focus of your eyes is on the computer screen. What is behind the computer is what Yu Guang saw, so you can't see it clearly. This is the so-called Jiao Wai. When you look out of the window, the focus is on the object you are looking at outside the window, and the computer that Yu Guang looks at is blurred.

The focal point in photography refers to the focal point, and the optical focal point refers to the convergence point of parallel rays refracted by a lens or reflected by a curved mirror. These two meanings are different.