How to choose focus mode and exposure mode for SLR photography

In many cases, the pattern is different. We should judge according to the actual situation. For example, when shooting beautiful women, I hope to have a relatively small depth of field, which can blur the background and highlight people, so it is best to use aperture priority mode and try to shoot with a large aperture. Characters are relatively static, just focus on one point;

If you want to completely freeze a moving person or thing, you'd better use the shutter priority mode and set the shutter speed at least higher than that of the moving object. If you shoot people, the shutter speed of 1/200 is almost the same. The focus mode adopts continuous focus (each manufacturer has different names for the focus mode, but they are all similar). When the focused object moves with the object, the machine will automatically judge the distance between the machine and the object, so as to focus quickly.