Why does a person's face look black when the camera is shooting at the sun?

Backlight is characterized in that the digital camera is facing the subject and the illumination direction is facing the lens of the digital camera. In this illumination direction, because the subject is facing away from the light source, the affected subject photographed under strong backlight is easy to form silhouette, and the subject is dark and bright around, and the outline lines of the subject are particularly prominent. For example, the five senses of a person's face are particularly suitable for taking profile images in this light direction, thus showing the corners of the mouth and the towering nose outline. However, backlight shooting has always been a taboo for ordinary users, because backlight shooting is easy to make people's faces too dark or produce unclear shadows. Improper use will also lead to incorrect subject color and insufficient exposure. & ltp If there is only backlight in the scene, auxiliary light can be added by devices such as reflectors. For professional photographers, backlight shooting is a common operation, because many times there is a light source behind the subject or the background is bright. If a singer walks at the front desk in a solo concert, it belongs to backlight shooting. In a backlight environment, the subject looks darker than the brightness of the background. Direct backlight will make the subject look too dark and easily form shadows. Too strong backlight can also lead to underexposure of the subject, so it cannot be said to be an ideal shooting condition. Because the basic condition of photography is smooth light, and backlight is not conducive to shooting, but it will get unexpected results if handled properly. The common processing method is to use the backlight compensation function. Some digital cameras and most digital cameras provide backlight compensation function, through which the subject can be brightened. Before shooting backlight, press the backlight compensation key, and when the indicator light appears in the viewfinder or LCD screen, you can shoot backlight. After shooting, be sure to press the backlight compensation key, so as to remove the backlight compensation state and make the indicator light disappear, otherwise the image will appear too bright in the case of smooth light. & lt/p If the digital camera has no backlight compensation function, you can turn on the manual function and find the brightness level button. Appropriate brightness enhancement can also achieve the goal. If the first-order aperture is increased and the light passing through the lens is increased, the surface of the object can be illuminated, and the brightness of the composition picture is relatively uniform when shooting in backlight, so the effect of using backlight compensation function is good. If the backlight is too strong and the contrast between the subject and the background is too large, the backlight compensation function can be used to adjust the brightness of the subject, but the exposure in the high-brightness area may be excessive, so the backlight compensation function can be used to adjust the brightness of the subject, but the exposure in the high-brightness area may be excessive, and measures can be taken to solve the problem. Another way to adjust the brightness of the subject by & lt/p backlight shooting is to increase the auxiliary light. You can use a reflector to reflect part of the light from the back of the subject to the surface of the subject, or add a light source next to the digital camera, so that the image will be a very distinctive and high-quality picture, not just a silhouette. It can be seen that the surface details of the object can be clearly displayed after the processing of auxiliary light, and the strong backlight can fully outline its outline and set off the position of the object in the scene. However, the application of auxiliary lights needs more experience, otherwise it is difficult to use them properly. Beginners use 25-40 degrees side light, not too bright. If lighting is used as an auxiliary light source, a diffusion screen must be added in front of the lamp, otherwise it will affect the contour line formed by backlight on the main body and cause unnatural light effect, especially when using electronic flash as an auxiliary light source. Because the color temperatures of different light sources are different, more than two light sources will make the white balance function of the camera not work properly. In this case, the color of the auxiliary light must be changed to match the color temperature of the backlight. If the backlight is sunlight, you can use light blue cellophane or filter cover to filter the light emitted by the bulb to make it close to the color of sunlight. & lt/p It's worth noting for beginners that some special effects can be shot in reverse light, and a hood should be used when shooting in reverse light to prevent strong light from directly hitting the lens, forming halos and light spots on the image and affecting the effect. The most important point is that if the lens is aimed at strong light, it may damage the digital camera. But in practical application, if you don't use a hood, don't do any processing, and shoot directly with backlight, you can shoot some unique images. Because backlight is conducive to expressing spatial perspective, expressing spatial depth and environmental atmosphere more widely, making the image have a sense of space and three-dimensionality. For example, in a lush forest, let the sunlight in front of the camera pass through the cracks in the branches to form a series of halos, which is a colorful and poetic picture. & lt/p In addition, for the performance of rain scenes, fog and smoke clouds, the image effect of backlight shooting will be much better than other kinds of light. When shooting silhouette shots of people, if the whole person is shrouded in shadows, the picture contrast is large and the backlight is strong, the outline lines of people can be drawn clearly and brightly, while the face is dark, which is also an effect of backlight shooting. & lt/p