Camera system, camera body, flash device, and illumination method

An illumination method in which a main light emission in which during photography a photographic subject is illuminated with a first light having a first color temperature, and a preparatory emission of light in which the photographic subject is illuminated with a second light having a second color temperature that is different from the first color temperature are performed before photography, comprising:

• capturing an image of the photographic subject and outputting an image capture signal during the preparatory emission of light;
• calculating an amount of the first light to be emitted during the main emission of light on the basis of the image capture signal;
• correcting the amount of the first light to be emitted that has been calculated, on the basis of a color temperature difference between the first color temperature and the second color temperature;
• and
• performing the main emission of light at the amount of the first light to be emitted after correction.

An illumination method, comprising:

• performing a main emission of light in which a photographic subject is illuminated with light having a first color temperature during photography;
• determining a second color temperature that is different from the first color temperature, so that a light emission efficiency at the first color temperature is greater than or equal to a light emission efficiency at the second color temperature;
• and
• performing a preparatory emission of light in which the photographic subject is illuminated with light having the second color temperature before photography.