Advantages of light reflection in photography

This question is a bit general. Reflective flash photography has many advantages, especially for portraits and still lives. It can reduce the contrast and avoid obvious photographing caused by direct flash. But if it is not handled properly in use, it will cause bad results. Therefore, it is necessary to have some essentials to master the reflected flash. 1. The photographer stands not too close to the subject, because the angle of light reflected downward from the ceiling makes the subject's face not illuminated, or only illuminated with extremely weak light, resulting in ugly shadows under the subject's eyes and nose. 2. Adjust the angle of the flash to prevent the subject or the part of the scene close to the subject from being directly illuminated by the flash, so that the photos taken are very ugly. In a small room, the flash from the flash lamp can only have a good effect if it hits the wall. But the wall should also be white, otherwise the reflected light will have different degrees of color. In this way, you can get more light and change more lighting angles than the reflection flash from the ceiling. If the ceiling is too high, or the ceiling is uneven but decorated, you can only use the surrounding walls. On many occasions, white walls can be used as reflecting surfaces. If the room is large, you can use a high-power flash to reflect it more than twice, so that the light is more uniform and the irradiation area is larger. If the wall or ceiling selected as the reflecting surface is not white, but other colors, that color will be displayed in the photo. So it's best to set up a reflective surface yourself. You can fix an ordinary white cardboard, or put it above the flash and adjust it to the position where you need to reflect light. 6. When you are close to the subject, you can get excellent light effect by using one or several pieces of white cardboard as the reflecting surface in the reflected light. 7. As another light distribution method in portrait photography, many people use white or silver reflective umbrellas to reflect light more and more, and still life is also widely used. No matter what kind of reflected light, there are strict requirements for exposure. It would be better if there was a photometer to measure the flash. No, we should take more photos with different exposures and accumulate more experience.