Why do you want to raise the k value when shooting the sunset?

Color temperature: the ideal blackbody emits light when heated, and its luminous color is expressed by the heated temperature (absolute temperature K).

Low color temperature and yellowish color are called warm tones; The higher the color temperature, the bluer the color, which is called cool tone.

The color temperature setting in the camera is to set the color temperature of "standard white", that is, to determine how much blue, green, red and white are mixed.

If you set a high color temperature, it consists of 4 parts blue, 3 parts green and 3 parts red; However, in the actual environment, the color temperature of white is low, consisting of 3 parts of blue, 3 parts of green and 4 parts of red. Then the photo will turn yellow.

Under normal circumstances, from noon 10 to 2 pm, when there is no cloud and direct sunlight in clear Wan Li, the standard sunlight is about 5200 ~ 5500 K, and the color temperature of news photography lamp is 3200 K; ; Generally, the color temperature of tungsten lamp and ordinary bulb lamps used in tungsten lamp and photo studios to take black and white photos is around 2800 K; ; Because of the low color temperature, the photos taken in this case will feel yellow after printing.