That also means that the color temperature at noon on a clear day is higher (bluer) than the color temperature of a fiery red sunset. But in the world of color temperature, blue is, in fact, a much higher temperature than red. This concept can be confusing because "red hot" is often thought of as being significantly warmer than blue. In this spectrum of light, color moves from red to blue as the temperature increases. As the heat intensifies, the metal color changes to yellow, and with even more heat, it glows blue-white. Unlike air temperature, which is measured in degrees Fahrenheit (or Celsius), light temperature is based on the spectrum of colors that is radiated when a black body radiator is heated. Individual styles with different settings can mimic the look of films, such as Fuji Velvia, for rendering landscape and nature shots How Color Temperature Is Determined All Picture Styles have specific settings for sharpness, contrast, color saturation, and color tone. The XSi/450D offers six Picture Styles, which are detailed in Table 3.2, and it uses the Standard Picture Style as the default style for Creative Zone shooting modes and for some Basic Zone modes. The Rebel XSi/450D applies a Picture Style for every image that you shoot and it is the foundation for how images are rendered. While the name Picture Styles may sound like an optional feature on the XSi/450D, it's important because it determines how the camera delivers tonal curves, color rendering, color saturation, and sharpness in the final image.
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