What does the main light source stand for in photography?

1. main light-main light, which illuminates the brightest part of the subject, is the most important light source in photography.

2. Auxiliary light-supplementary light, which is used to supplement the light in the dark part of the theme and adjust the light ratio when controlling the light ratio.

Generally, the light quality of the main light can be harder than that of the auxiliary light, but the classic usage should be to adjust the light quality according to the specific situation of the subject and the needs of the tone performance of the picture. The light level of the main light is flexibly determined according to the performance needs of the subject, the requirements of shaping the artistic atmosphere of the picture and the performance of the color tone of the picture, and there is no certain law. In general, the intensity of the main light in the picture is relatively strong. The actual dosage should be determined according to the actual exposure of the picture, the light ratio of the main light to the auxiliary light, the sensitivity of the photosensitive material and other factors. When the color of the contour part is dark, the intensity of the contour light can be higher than the main intensity. The color temperature of the main light should be determined according to the needs of the theme and subject performance.

The main function of auxiliary light in this lighting scheme is to display darkness and control the contrast of the picture. The brightness of the auxiliary lamp is usually the same as that of the camera. The quality of auxiliary light should be flexible light, and the intensity of auxiliary light should be determined according to factors such as the color tone of the picture, the recording ability of the film, and the needs of the body performance of the subject.