What are the categories of light in photography?

Brother, your question is too general. Let me simply classify it for you. Downlight is the light that shines from the back of the camera. Since the light shines evenly on the surface of the subject from the front, the light-receiving area is large and there are few shadows. Metering and exposure control are relatively easy when shooting, even with automatic exposure. mode, generally there will be no exposure errors. But its shortcomings are also obvious - even if the surface of the subject is uneven, because the light intensity is exactly the same, the shadow is not easy to appear, which will cause the object to lack texture and three-dimensionality, and the entire photo will look flat. Front light is especially not suitable for larger scenes, such as scenery, or portraits (usually you will find that in a large group photo taken with the light, there are only two black holes left on each person's nose

Side light It refers to the light shining from the side of the subject. It can make the surface of the subject show partial shadow due to unevenness, so that the light-receiving surface and the light and dark side of the object have obvious expressions respectively, which can outline the outline of the subject. , and can reflect the three-dimensional effect. This kind of light is the most expressive, so side light is the most commonly used light in photography. However, when using it, you should pay attention to the proportion of the light-receiving surface and the dark surface in the picture shape. The angle of oblique light is the best. When the direction of the light is at an angle of about 45 degrees to the plane of the scene, the light at this angle makes the ratio of the light-receiving surface to the dark surface of the subject roughly equal, which is more in line with people's daily vision. Get used to it

Backlighting refers to the light coming from behind the subject. When shooting with backlight, it is easy to turn the subject into a silhouette, so it is relatively difficult to control the exposure. Backlighting is often not recommended for beginners. Photography. But the artistic effect of backlighting is also unique - backlighting can add a moving edge of light to the outer edge of the subject (if it is sunlight, it will be a golden edge), and if handled properly, it can create a unique beauty. Create an artistic sense of light and shadow

What you need to pay attention to when taking backlit photos is that the light ratio between the foreground and the background is too large when backlit, which often results in overexposure of the background or underexposure of the foreground. In order to reduce the light ratio , you must pay attention to filling the foreground with light, you can use a reflector or a flash - if you see someone using a flash when shooting against the sun, you have to respect him, because he is an expert, he is narrowing the foreground and the The light ratio of the background.