Two photographic lamps

First of all, if you use flash, don't use P file, it's better to use M file, because the P file of the camera doesn't recognize flash, the P file only recognizes the automatic combination of aperture shutter, and the automatic file only recognizes the TTL exposure of the set-top box lamp and the original lamp. Extra lights won't make him so smart. Look at your picture, it's a lighting problem, and the focus is on the collar, the bottom is blurred, so the focus must be accurate. Test more, there is a light ratio between the main light and the auxiliary light, that is to say, the brightness or distance of the main light and the auxiliary light should be different, which you can see in the case of modeling light. The shutter is set within the synchronization speed, which is generally 60 or 125, and cannot exceed 1/200 seconds. Use aperture to control exposure. If the light ratio is not suitable, the distance between the two lamps can be adjusted. . . PS is a later thing, but the premise is that it must be done well in the early stage, otherwise it will be difficult to do well in the later stage. That's just an auxiliary function. . .