Selection of Light Angle for Different Types
- Oct 26, 2019
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Usually only in cloudy days do not need to consider the horizontal angle of light. The light in cloudy days scatters down from thick clouds, and the angles are very inconsistent. This kind of light is generally defined as soft light in photography. The contrast between light and shade of a picture taken at any time point is comparable when the brightness of the picture can satisfy sufficient exposure.
Clear and cloudy weather is totally different. As mentioned at the end of the previous chapter, when the subject is a character, lighting should at least consider whether the bright sun will cause damage to the eyes of the subject. Even at dusk, orthophotic light can lead to flat picture layers, and it is easy to incorporate the photographer's shadow into the picture when using wide-angle lenses; when changing to the sun on the side, the characters will appear distinct personality; when the characters back to the sun, they can get good outline bright spots, but the brightness of the front becomes a problem...
First of all, I want to analyze the horizontal angle of light used in photography, based on the definition of angle calculation. In order to better describe the relationship between light and picture, angle is defined as the angle between light direction and lens optical axis. Such a definition is more scientific. We are always accustomed to think that the subject's back to the sun is a backlight, ignoring the selection of camera location, and can completely use backlight as sidelight.
The angle is defined as smoothness when the light axis of the lens is 0 to 30 degrees. Smoothing provides sufficient illumination for the object's head-on lens. The contrast of the picture is small and the details are clearly displayed.
Shun Guang portrait
Shun Guang scenery
If photography only pursues detailed records, then smoothness is undoubtedly the best angle light. In fact, in the investigation and forensic photography, which pays attention to records, it is indeed the most used. But in creation, the meaning of Shuangguang has been greatly weakened. It is undeniable that entertainment photography is also an art, art requirements come from life and higher than life. Using light to make photography more beautiful is the same as rhetoric to make articles smoother, which you will soon see from the light effect of the back styling. Over-objective images can be described as mediocre in art, and the disadvantage of smoothness is not only that, because of the lack of contrast between light and shade, shadow foil, when the subject is a person, it can also enhance the three-dimensional picture by adjusting the figure's posture fluctuation. If the subject is a landscape, this kind of sense of plane will be difficult to avoid. The use of smooth modelling for the subject also takes into account the opening of the eyes mentioned above. When people are exposed to intense light, they tend to look like the ground and close their eyes in a planar picture.
Fair light is not useless, thanks to adequate lighting, it is very good for the performance of bright colors.
The front side light is defined when the optical axis of the lens is at an angle of 30 to 70. The light angle slightly moved, and the picture changed a lot.
Front Light Portrait
Front Side View
The slight shadows increase the level of the picture, the bright part seems closer to the camera, and the dark part is the opposite. Characters are thinner and smoother under the illumination of the light position. The color of the picture is still gorgeous because of the more light on the front of the lens. The tune is as high as smooth. Note: The tone refers to the trend of light and shade in the picture. The light is high-key while the dark is low-key.
The scenery of the front light does not change much compared with the smooth light, but the foil of the shadow is just like the finishing touch. In fact, in outdoor use, the front side light portrait will be as difficult as the smooth portrait to open their eyes. Landscape photography also needs to rely on a larger angle to get a better visual effect.
As the angle between the light and the optical axis of the lens increases, the near right angle is called side light. Side light is characterized by a distinct distribution of light and shade. Without darkness compensation measures (such as reflectors), there is a great contrast in outdoor hard light.
Side light portrait
It can be seen that the figure's face outlined by side light has distinct light and shade segmentation lines, which is a new modelling element given by light to the picture. In many cases, it can bring innovation to composition. When the subject is a person, the side light shows a strong personality. When shooting scenery, the side light also shows a very good texture. Of course, it should be noted that personality is not always deliberately used. Photographers should pay attention to whether the contrast between the two sides formed by side light is too large and whether it meets the needs of the situation.
When the light and the optical axis form a blunt angle, we call it side backlight. When it reaches nearly 180 degrees or 0 degrees, it is called backlight. Side backlighting and side backlighting are both large angle light, and they all shape low tones.
The contrast is very large. If you don't take supplementary measures, the dark details will be lost because of the serious lack of exposure. Even if you use the exposure compensation on DV to improve the brightness of the subject, the background will overflow with high light and form a very high haze in the picture. But in many cases, big contrast is not bad for artistic creation. It greatly strengthens the stereo sense of the picture and widens the distance between the image works and real life. This is how silhouettes are formed. Exposure compensation reduces exposure and can be easily obtained in dusk backlight.
Side backlighting can get a beautiful profile on one side, and the profile of backlighting is more comprehensive. Photographers who want to retain the details of the backlight must use supplementary lighting equipment for auxiliary lighting. Reflector and continuous light source with large illumination area are good choices. When using artificial light source, we must pay attention to the color temperature problem. The pictures created by multi-color light source are often weird, but the standard color temperature (about 5500K) light source is a good choice at dusk. It not only retains the warm background tone, but also correctly restores the foreground color.
The angle selection of outdoor natural light relies on the adjustments of the position of the subject and camera by the photographer, but the subject of shooting scenery can only choose the best angle light according to the waiting time.