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The effect of “lengthening exposure” is familiar to anyone who used a compact camera set to “night portrait” mode. In order for bright blurred streaks to appear around the main…

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DIGITAL PHOTO CLEARING - YOUR PHOTOGRAPHIC TIME MACHINE
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HOW TO INSTALL THE WHITE BALANCE AND WHAT IT INFLUENCES IN PHOTOS

While the human eye can easily adapt to changing shades of light, the camera is a bit more complicated. Because of this, you yourself must tell her when she recognizes colors unrealistic. This is done by setting the camera modes or auto white balance. How to precisely adjust the colors of the scene so that they match the reality?

Digital photos consist of information about shades (brightness) and colors. The shades in the photo are controlled by the exposure settings of the camera. The main tool for managing the color of a photo is the white balance setting.

Light color

Different light sources have different shades. The human brain effectively adjusts color perception to take this into account. For example, when an incandescent light falls on a sheet of white paper, it “paints” this paper in orange. The brain knows that the sheet of paper is actually white, and therefore, in the perception of a person, it automatically corrects the color cast caused by the light source.

But the camera does not work that way. She captures the actual color of the light, so she needs to somehow tell whether the colors of the scene being shot have shifted.

The easiest way to see colors in individual light sources is to take an evening walk through the city. Your brain will be tuned to external light, and when you look into the windows of apartments and houses, you will see orange light from incandescent bulbs, blue light from any CRT TVs you may still encounter, and green light from fluorescent lamps.

Color temperature measurement

The color temperature is expressed in units of temperature, to which the “black body” (an object that does not reflect light) must be heated in order for it to emit light of this shade. Color temperature is measured in Kelvin. When you heat a black body, the heat gradually turns it into red, orange, yellow and white, until it finally turns blue at the highest temperature.

Thus, the scale of color temperature is the opposite of how we used to perceive colors. Warm shades (red, orange) have a lower color temperature than blue, which we usually consider cold.

When shooting, you must directly or indirectly tell the camera what the temperature in Kelvin is at your lighting. The camera processor then includes this information in the final coloring for the photos you have taken, and they look realistic, without color shades. Although it sounds rather complicated, in practice everything is easier.

To “warm up” your images, set a higher temperature in Kelvin in the settings. To “cool” – set a lower temperature. Keep in mind that some cameras do not have the Kelvin scale option in the white balance setting. If so, you can use the white balance presets, which we’ll talk about below.

White balance adjustment (setting the correct color temperature)

Auto white balance
Usually with factory settings, your camera uses AWB (Auto White Balance). These sophisticated embedded systems in the cameras automatically determine the color temperature of the current lighting and on the basis of this set the white balance. As with the automatic exposure settings, this method succeeds about 90% of the time, and you can usually rely on it. In situations with difficult lighting, you have several ways to influence your white balance settings.

Using AWB. The automatic white balance of the camera appreciated this scene and set the white balance correctly to get a blue sky. However, the color of the photograph is not enough mood, which was originally. Canon EOS 7D, EF-S 15-85 / 3.5-5.6, 1/640 s, F16, ISO 100, focus 42 mm (equivalent to 67 mm)

Manual Presets
The easiest way to influence white balance is to use presets in the camera. Standard white balance presets have names like daylight, cloudiness, shade, tungsten (or incandescent), fluorescent light, and flash. Using one of these presets, you choose a color temperature that, according to the manufacturer, is suitable for the situation described in it. For everyday photography, they are quite enough. But when you want to set the white balance more accurately, for this there are special tools.

The same scene as in the previous photo. White balance has been set to Cloudy. Now the gloomy colors of the sunset were captured correctly. Canon EOS 7D, EF-S 15-85 / 3.5-5.6, 1/640 s, F16, ISO 100, focus 42 mm (equivalent to 67 mm)

Let’s look at each of the white balance presets.

“AWB” is an auto white balance setting. Select this preset so that the light sensor of the camera can choose the best white balance setting depending on the color of the available lighting. AWB helps in mixed lighting conditions.

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