White Balance
One of the features of a digital camera is to setup so-called white balance. This is to ensure that the red nose on your neighbor’s cottage turned red, not blue, that wedding picture groom presents his bride white flowers of purity and innocence, rather than yellow, a red rim on policemen’s cap, and not green, like on a forester.
What exactly should be done to properly set the white balance, you know very well - this is written in the user guide for your digital camera. Typically, the camera is fully automatic mode - auto, several pre-treatment, - fine, cloudy, Tungsteen, fluorescent, speedlight, and set the white balance mode manually - «preset». Names and nomenclature in different cells may differ, but the essence of this does not change.
As stated manufacturers of digital photography (only for some reason not in the operation manual and not in the promotional material), none of the preset modes, and moreover the automatic mode does not give absolutely accurate color, that is, quite simply, all the modes a little lie. This is understandable: pre-configured profiles for a certain color temperature, but the real color temperature light source may differ slightly from it. Therefore, the number of cells have additional graduation for each mode. For example, from - 3 (for warm tones) to +3 (for the cold tones) for shooting in cloudy days. But they are not much easier in the life of photographer. Many photographers use manual mode, set the white balance on a white sheet of paper or any other white (neutral gray) surface. Physicists explain this by saying that the white surface is almost completely reflects the light falling on it, as a poor relative of the body is white. And because it is assumed that the remaining items in the area covered by the same source, any deviation from the true white (5500 K) will be deducted or added evenly throughout the field of photography, and color should turn out the way they would look in daylight, but not how they look in reality.
These things are all familiar with, so I will say only that sometimes the artificial cutting of all types of coverage under the comb daylight affects negatively. Here’s an example. Dinner by candlelight in a restaurant with a filling of light from incandescent lamps. Entering treatment Tungsteen, you get a shot: two strange people in the daytime sitting in a restaurant in evening dresses and watched as a blue candle burn slightly yellow flame.
When we expose the white balance manually, we recommend using a white sheet of paper. We are also curious and inquisitive photographers landscape, interesting question: what would happen if we set the white balance not on the white sheet of paper, and the red, blue, green, any other? You can conduct experiments (which was done by me), but remember the outcome of irrational; better withdraw pattern, so that easy to predict the outcome.