Backlight (photographic terminology) detailed data collection

Backlight is a state in which the subject is just between the light source and the camera, which easily leads to underexposure of the subject. Generally speaking, photographers should try to avoid shooting objects in the case of backlight, but sometimes the special effect produced by backlight can also be regarded as an artistic photography technique.

Basic introduction Chinese name: backlight mbth: backlight application: artistic creation photography function: enhancing texture, enhancing rendering generation and countermeasures Main application, photography function, timing selection, photography tips, generation and countermeasures Because the subject is just between the light source and the camera, the background brightness is much higher than the subject. Because the background occupies a larger frame in the picture than the main body, the automatic exposure detection program of the fool camera will order the camera to expose according to the light condition of the background, which will make the main body underexposed and lead to the failure of photography. Backlight conditions greatly increase the difficulty of automatic exposure of a fool's camera, so generally speaking, photographers should try to avoid shooting objects under backlight conditions. However, there are still some ways to avoid the failure of taking pictures in backlight. If the subject is not far from the camera, the photographer usually turns on the flash to improve the brightness of the subject; If the distance between the main object and the camera exceeds the effective range of the flash, the second exposure method can be used to shoot. Main applications Although backlight conditions increase the difficulty of photography, backlight conditions can sometimes be used for some artistic creation. Skilled photographers often use backlighting to achieve some unusual visual effects, such as backlighting, especially good at vividly showing the outline of objects. Backlight is a kind of lighting with artistic charm and strong expressive force, which can make the picture produce an artistic effect completely different from the actual light we saw with the naked eye at the scene. Its artistic expression is: backlight is the first, which can enhance the texture of the subject. Especially for shooting transparent or translucent objects, such as flowers, plant branches and leaves, backlight is the best light. Because, on the one hand, backlight illumination can improve the brightness and saturation of transparent objects, and dull transparent or translucent objects under forward illumination present beautiful luster and good transparency; On the other hand, the brightness difference between transparent and opaque objects in the same picture is obviously widened, and the light and shade are opposite, which greatly enhances the artistic effect of the picture. Second, it can enhance the rendering of the atmosphere. Especially in the morning and evening of landscape photography, the light and shadow modeling method with low angle and large backlight is adopted. Reflection paints rosy clouds as dyes, clouds as transpiration, and mountains, villages and trees as ink paintings. If mist, canoes and birds are added, it will cause a deep sound in vision and psychology, which will make the work deeper in connotation, higher in artistic conception and stronger in charm. Third, it can enhance the visual impact. When shooting in reverse light, due to the increase of the proportion of dark parts, quite a lot of details are blocked by shadows, and subjects with simple lines or small light receiving area suddenly appear in the picture. This large light ratio and Gao Fancha give people a strong visual impact, thus producing a strong artistic modeling effect. Specifically, first of all, the background can be underexposed under the backlight, and the background can be purified, so as to achieve the effect of highlighting the subject; Secondly, it can vividly outline the clear outline of the subject, separate the subject from the background, highlight the ups and downs and lines of the subject, and strengthen the subject's sense of subjectivity; Third, it can profoundly portray the character. Because the light receiving area of the whole picture is small, most of the face and body are in shadow, forming a dense low-key picture dominated by dark colors, which is helpful to express the deep, implicit, solemn or melancholy character of the characters. At the same time, due to the large color contrast and strong light and dark layout, some defects in the face of characters can be diluted by strong light and covered by the shadow of backlight, so as to achieve the effect of fostering strengths and avoiding weaknesses. Fourth, backlight can enhance the depth of the picture. Especially when shooting in the morning or evening with backlight, the color composition has changed from far to near due to the different media conditions in the air: the foreground is dark and the background is bright; The foreground color saturation is high and the background color saturation is low, which causes the whole picture to go from far to near, from shallow to deep, and from shallow to deep, forming a subtle sense of spatial depth. Backlight photography with time selection has strong artistic expression and is deeply loved by photographers. It is very important to grasp the light if you want to shoot a good backlit work. As far as the sun is concerned, its light is changing all the time, especially in terms of intensity, angle and color temperature, which has an important influence on backlight shooting. It is necessary to be familiar with the characteristics of different lights, grasp their inherent laws, and grasp the shooting opportunity in order to shoot freely. Backlight shooting can't be blind, we must first understand the shooting intention, and then decide what kind of light, composition and so on to choose. Generally speaking, shooting light is divided into two categories: natural light source (sunlight) and artificial light source. Focus on the natural light source, in order to facilitate the grasp, divided into three periods. The first time is at sunrise and sunset, the angle between the light and the ground is small (about O-30), and the intensity is weak, which is very beneficial to backlight, especially when shooting short objects. Low color temperature can better contrast the atmosphere and artistic conception, and make the work form a warm tone. It should be noted that at sunrise and sunset, the light changes quickly, and the magnificent scenery slips away instantly. It is necessary to fully strengthen the preparatory work in the early stage. The second period is two hours after sunrise and before sunset, when the sun makes an angle of about 30-80 degrees with the ground. If the weather is normal and the light is strong, backlight shooting will encounter strong halo, which is not conducive to expressing the shape of things. We should try to avoid shooting directly in front of the light source. Shooting with reflected beams from other objects will weaken the light intensity. The third period is noon, when the light is basically perpendicular to the ground, and the light is very strong, which is extremely unfavorable to backlight. You can use the foreground or the subject as your own shelter, so that the sun can form a strong radiation effect. I remember a masterpiece of shooting the Statue of Liberty, that is, at noon, the author properly shielded the strong sun directly behind the torch held high by the Statue of Liberty, forming a strong radiation effect, just like the dazzling light emitted by the torch. This not only adjusts the light intensity well, but also increases the artistic charm of the work. In case of bad weather, we should foster strengths and avoid weaknesses, and look for positive opportunities among unfavorable factors. For example, in the seaside or lake area, water vapor and fog are generally large and visibility is low, but if used reasonably, it can not only soften the light, but also better express the artistic conception. Photography skills Backlight photography often produces unpleasant halos and halos. However, everything is not absolute. As long as it is used properly and combined with good composition, backlight shooting can also achieve beautiful results. Backlight 1. By measuring the bright background without filling the foreground, a strong contour effect can be obtained and the atmosphere can be well rendered. 2. You can get more details by filling the foreground with reflector or flash. 3. Backlight shooting can produce dazzling contour light around the object, which strongly outlines the appearance of the object. 4. When shooting subjects that are easy to transmit light, such as flowers, trees, etc., the backlight level can be adopted, and the subjects will show stronger texture. Backlight 5. Pay attention to the composition when the lens has serious halo, and adjust the lens position slightly to avoid the halo covering the subject. 6. Backlight shooting will affect the accuracy of autofocus, and you can focus accurately by manual method. 7. Avoid looking directly at the sun through the viewfinder for a long time, causing visual damage.