The actual purpose of light intensity, softness, hardness, and width in commercial advertising photography

The task of all plastic arts is to use their own unique means to depict the visual factors of specific objects under lighting conditions. Photographers engaged in film and television styling work should not only know under what lighting conditions the objects can be seen, but also what lighting conditions can best express the objects.

Camera use a camera to convert the light and shadow images of the object's shape and structure into television signals that can be converted into screen images. Only with correct exposure in photography can we ensure that the shape and color structure of the subject and object are accurately reproduced in line with visual perception, and that the rich color gradation of the scene can be correctly restored. This is the most basic and minimum requirement for the use of light.

The modeling task of photography is the same as other plastic arts, which is to express the shape (shape, volume, three-dimensionality), quality (texture, surface structure, texture), color (color, tone), and movement of the object. (motion process), space and time.