Who can tell me how to set the exposure after the SLR is equipped with a hot shoe flash?

The shutter speed required for flash photography is below1125 seconds, and the flash amount is mainly controlled by the aperture. If the aperture is large, the shooting distance is far; If the aperture is small, the shooting distance is short.

Specific parameters can be found in the attached table behind flash.

It's hard to say a few words about the exposure setting. First of all, we should measure the correct exposure combination without using a flash, and then adjust the shutter and aperture combination as needed. Ensure that the shutter speed is within the maximum speed specified by the flash, and the aperture can be appropriately adjusted according to the distance value on the back surface of the flash. The specific adjustment should be based on the scene situation and shooting ideas, and can only be explored in practice.