Wednesday, September 30, 2020

How adjust camera white balance?


Adjust the camera white balance for getting the correct colour

Aperture, shutter speed, ISO, etc. are so important when taking pictures that the issue of white balance is often not important. As a result, the picture is sometimes bluish, reddish or greenish. This problem can be easily solved by fixing the white balance.

Let's find out what is the issue of white balance?

Think of the two brightest and darkest points in the picture. The lightest part is supposed to be absolutely white, the darkest part is supposed to be absolutely black. The system of showing white as completely white is called white balance.

There is some light theory behind this. Each color has its own characteristics compared to white. It is measured on the Kelvin temperature scale and is called color temperature. Ultraviolet short web wavelengths have higher color temperatures, such as white being 5600 degrees Kervin, while infrared long wave temperatures are lower at 2000 degrees Kelvin. 

The middle colors from bay to red are blue, green, yellow, orange, etc. respectively. Scientifically, color temperature is the change in color at different Kelvin temperatures when carbon is heated. For example, at a temperature of 2000 degrees, the color of carbon is red. Absolutely white at 5600 degrees.

Consider the example of the sun. At noon when the color temperature is highest we get white light, on the other hand the color temperature decreases due to angular position during sunrise or sunset, we get reddish and yellowish golden light.

When we look into the eyes, the eyes can easily adapt to it. But the camera doesn't do that on its own. As a result, if the white balance setting at noon color temperature is used when taking pictures of the sunset, there will be no reddish-yellow color. You also won’t get the right color. You can get the perfect color picture by looking at the Why Balance setting.

Most cameras have a few options for setting the white balance. One of them is the auto where the camera itself analyzes the light and decides what kind of white balance will be used. Professional photographers use it the least.

There are also names like direct sunlight, cloudy day, shadow, candle light, fluorescent tube light, normal light, flash etc. When you want to take a picture in that light, you can select it.

Experienced photographers are not satisfied with this (that is why their pictures are good). For them, some cameras have the ability to adjust the white balance by looking at the degree Kelvin value. For this you need to know the color temperature of any light. The task is difficult.

Many cameras have a system to check the color temperature of the place where you are taking pictures. Only in this way is it possible to use the exact color temperature.

Take the Nikon D90 camera as an example,

- Select Preset Manual from the menu

-Put a white paper (or something completely white) in the situation where you are taking pictures

- Go to Aparture Priority mode

- Hold down the White Balance button and keep rotating the command dial until the preset appears.

-Release the white balance button, then hold it again for 2 seconds. The preset icon on the display will continue to blink.

-Focus the white paper on the whole screen.

- Press the shutter release button.

No pictures will be taken but the camera will record the value for the white balance of that situation. If the correct value is recorded, you will get a good text on the display.

These values ​​may change as the environment or light changes. So after a change of place or time you may have to adjust this setting again. It will take a few seconds to do this. Use this if your camera has this feature.

There may be some variations in the method for other cameras. Check your camera manual to find out.

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