How to focus correctly in photography

1, single autofocus, camera factory setting to the default configuration of continuous focusing by shutter. If the camera is set to single autofocus, all you need to do is activate the autofocus sensor. Just press the shutter to take this photo. If you want to change the composition, press the shutter halfway to select the composition, and then press the shutter completely.

2, continuous autofocus, this mode is very suitable for tracking moving subjects, because no matter whether it moves closer or farther, the lens is constantly autofocusing. Usually continuous autofocus is on the camera body, which may be the choice of a switch or a series of buttons. Continuous autofocus can also be started by the shutter button.