Photography is the art of light modeling. It is necessary to study the direction and light position of light to the effect and effect of photography. Therefore, we briefly talk about the influence of light direction on the effect of photography. The nature of light has many classifications depending on the shape and direction of incidence, color, and short wavelength of light. Here we mainly introduce the direction of light.
The direction of the light, mainly relative to the photographic lens, can also be said to be based on the observer's perspective. Refers to the angle of light formed between the position of the light source and the direction of the shot. A change in either the position of the light source or the direction of the shot can be considered as a change in the direction of the light. The direction of light in the three-dimensional space is very rich. The direction of the light is the main condition for the shape of the scene.
The light level is the angle of light (including the horizontal and vertical angles) that constitutes a certain styling effect of the subject. The light position is a change of illumination around the object to be photographed under different conditions of the photographing direction. In the light processing of photographing, it is divided into straight, side light (slant side light), side light in the horizontal direction. The side light, back light, top light, foot light (fore foot light, rear foot light) are determined by the viewpoint (shooting position). The change of the viewpoint means the change of the light position, which means the light receiving area and direction of the subject. Such changes in light effects.
Under natural light conditions, the sun acts as the primary source of light. The height of the sun and its angle with the direction of the shot determine the light level. Artificial lighting, the light level can be adjusted according to the shape needs. Subtle changes in the light level will produce subtle changes in the photographic shape.
1, Shunguang, also known as "front light", the direction of light projection and the direction of the camera shooting direction. When the light is shining, the subject is evenly illuminated, the shadow of the scene is blocked by itself, and the tone is softer, which can hide the surface unevenness and wrinkles of the subject, but it will be dull when not handled properly. Shunguang illumination is not conducive to the performance of atmospheric perspective in the picture, and the spatial stereo effect is also poor. It is also less rich in backlight contrast and contrast than the sidelight side. The advantage of Shunguang is not only the soft tone, but also a good reflection of the inherent color effect of the scene. When the light is processed, the darker light is often used as the sub-light or the modeling light.
2. Side-smooth light (slant side light): Photographic illumination when the horizontal direction of light is projected at a 45-degree angle to the camera lens. In the creation of photographic art, it is often used as the main shaping light. This kind of light illumination can make the subject change light and dark. It is a good expression of the stereoscopic effect of the subject. The surface texture and contour, and can enrich the dark level of the picture, play a very good role in shaping and shaping.
3, side light: the light projection direction and the shooting direction are about 90 degrees of illumination, the object illuminated by the side light, there are obvious dark side and projection, which has strong expressive power on the three-dimensional shape and texture of the scene. The disadvantage is that the halftones and layers that are too dark and half-concealed are often formed, and the imbalance is often formed in the scenes of the big scenes. This requires consideration of the proportional relationship between the scene and the shadow on the composition.
4, side backlight: also known as the opposite side of the light, the back side of the light. Illumination when the direction of light projection and the direction of camera shooting are approximately 135 degrees horizontal. Most of the scenes with side-lighting illumination are in the shadows. The illuminated side of the scene often has a bright outline, which can better express the contour form and three-dimensionality of the scene. This kind of illumination can better express the atmospheric perspective effect in exterior photography. When using the side backlight to make close-ups and close-ups of the characters, it is generally necessary to perform auxiliary illumination on the characters to avoid the face being too dark, but the brightness of the auxiliary illumination light should be controlled so as not to affect the side backlight natural lighting effect.
5, backlight: also known as "back light." The light from the back of the subject is illuminated, and since it is illuminated from the back, it can only illuminate the outline of the subject, so it is also called contour light. Backlighting has three forms: positive backlighting, side backlighting, and top backlighting. Under the condition of backlight illumination, most of the scenes are in the shadows. Only the contours of the illuminated scenes make the scene different from the Other scenes. Therefore, the layers are distinct and can express the atmospheric perspective effect well. In the distant view, this kind of light is often used to make the picture rich.
6. Top light: Illumination from the light above the subject. Under the top lighting, the horizontal illumination of the scene is larger than the vertical illumination, and the brightness of the scene is large and lacks an intermediate level. Shooting people under the top light will produce abnormal and peculiar effects, such as bright forehead, dark eyes, nose and drooping, prominent cheekbones, and shadows on both sides, which is not conducive to the beauty of the characters. If the auxiliary light is used to increase the shadow brightness to form a small light ratio, a better shape can be obtained. In landscape photography, a good tone effect can be obtained by shooting the position properly. The top light includes the top light, the top light, and the top back light. The first two lighting effects are similar, and the latter is similar to the backlighting effect.
7. Foot light: The light of the person or the scene is illuminated upwards from below. In front of the front foot light, this styling light forms a bottom-up projection, resulting in an abnormal shape. It is often used as a natural light effect in light sources such as oil lamps, table lamps, and bonfires. Or used as a modeling means to portray special characters, special emotions, and special atmospheres. It can also be used as a finishing light for the face. The foot light behind the scene is called the hind foot light. This kind of light illuminates the character's hair, especially the long hair of the woman or the details of the scene. It is modified and beautified. It is often used in the shooting of the studio. An effect light is used.
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