What are the expressive forces of three kinds of light in camera shooting?

Divergent light: the light projected from the back of the photographer to the subject. The sunlight shines evenly on the subject, and the obtained picture is clear and elegant, but the color tone is dull, lacking the change of light and shade, three-dimensional sense and perspective. Sunlight generally shoots high-profile objects and portraits of children, which cannot show the vicissitudes and wrinkles of the elderly and the three-dimensional sense of the building. Using sunlight in landscape photography can get a bright and concise picture, but it lacks three-dimensional sense, and the theme and background colors are easy to mix together, so it is difficult to show a sense of hierarchy.

Side light: the light projected by the light source from the photographer's side to the object being photographed. Because of the obvious shadow, the contrast between light and shade of the subject is obvious, the contrast is strong and the color is rich, which fully shows the three-dimensional sense and texture of the subject. Side light is often used by us, and it is the most ideal light for shooting landscapes, buildings and portraits. However, when shooting in sidelight, the exposure should be properly controlled to make the contrast appropriate, the dark part should have a sense of layering, and the bright part should not be exposed. When shooting portraits or close-ups, white objects or flashlights can be used as supplementary light to appropriately increase the brightness of dark parts, fully showing the texture and level of the subject.

Backlight: the light projected from the back of the subject by a light source. Split backlight and positive backlight. Backlight will draw a bright outline on the edge of the subject, which is what people call side light in photography. The sidelight clearly separates the subject from the background. People use side light to add three-dimensional sense and space to the subject. Backlight can show the ripples of water, snow scene, sunrise, morning glow and sunset glow. Backlight can be used for silhouettes because of its weak ability to express details. When backlighting, add a hood to prevent light from entering the lens. Second, we should pay attention to exposure, or fill the subject with light, especially when shooting close-up portraits, which is particularly important.

Photography is the art of light, and there is no formula for what kind of light to use. If you practice and experience often, you will gain something.