Photographic lighting is a technical term, and the pinyin is shè yǐng bù guāng. Usually, the intensity of the main light and the auxiliary light and the distance from the subject determine the light ratio. The auxiliary light generally uses soft light, and its light level is usually opposite to the main light. The main function of contour light is to produce a bright contour for the subject and separate the subject from the background.

Lighting is a creative work in indoor lighting photography such as advertisements and portraits. It not only embodies the photographer's personality and style, but also relates to the success or failure of a work. In photography, the study of light characteristics generally starts from six aspects: luminosity, light quality, light level, light type, light ratio and light color.

1. brightness

Brightness is the most basic factor of light, and it is the general name of the luminous intensity of light source and the brightness of light on the surface of an object. The luminosity is directly related to the exposure, so the luminosity is large and the required exposure is small; Low luminosity and large exposure.

In addition, brightness also indirectly affects the depth of field and the clarity or blur of moving objects. Large luminosity is easy to produce the effect of large depth of field and clear image; Low luminosity is easy to produce small depth of field and blurred moving image effect.

2. Optical level

Light level refers to the irradiation direction of the light source and the position of the light source relative to the subject. In photography, the intensity of light determines the bright and dark position of the subject, and also affects the texture and shape of the subject. The light level can be varied, but when the position of the subject and the camera is relatively fixed, the light level can be divided into six types: front light, side light, back light, top light, foot light and scattered light.