What do SLR cameras AF-A, AF-C, AF-S and MF all mean?

In other words, the camera will automatically select the focus according to the subject. Although convenient, there may be accidents and it is generally not recommended.

AF-C: continuous focusing

For example, if you want to shoot a girl riding a bicycle, but the subject is moving, there may be a blurred state when using a single focus, so you need to use continuous focus. (Left: single focus, right: continuous focus) In short, continuous focus is suitable for shooting moving and moving objects.

AF-S: single focus.

Suitable for shooting still objects, such as landscapes, flowers and plants, still portraits, etc.

When the subject is resting, the camera will automatically lock after focusing, so just press the shutter half.

MF: Manual focusing.

When there is insufficient light or contrast in the shooting environment and special composition is needed, the photographer needs to focus manually at this time.

Extended data:

?

In fact, the focus is not a "point" on the screen, but a surface, so the plane composed of all points that can clearly image the position is usually called the "focal plane". The photographic lens should be able to clearly record the objects on the focal plane, and the farther it is from the front and back of the focal plane, the more blurred the image is.

When the camera focuses, the general SLR camera is in a fixed focusing mode. Through the refraction principle of light, the light shot in the lens passes through, and then a phase difference is formed on the focusing module. At the same time, the function of judging the focusing progress according to the focus is designed. But relatively speaking, objects with a sense of depth from the focal plane may also be processed more clearly, which is the application of "depth of field".