Is there a difference between a camera's fill light and a flash?

1, the so-called fill light of the camera is actually the focus assist light. When shooting in the dark, it is difficult for the camera to focus because of the dark environment. When the focusing auxiliary light is turned on, the auxiliary light will illuminate the subject and make the camera focus accurately. After focusing, the auxiliary light will be turned off and will not participate in the fill light. The flash is when shooting in the dark. When the shutter is opened, the flash will flash to illuminate the subject.

2. Flash:

3. Fill light:

4.LED fill light lamp uses LED to fill the light of the photographed object. Because of its low energy consumption and high brightness, LED lamps are generally used in mobile phones or digital cameras to fill the light when the light is insufficient. Because the brightness of LED is much lower than the real flash, it can only play the role of "fill light".

Now some mobile phones have used the same flash as cameras, such as K790c of Sony Ericsson, which uses xenon flash, which is better than LED fill light, but it can't be used as a flashlight like LED.

6. Principle of LED flash lamp: LED does not emit light by jumping electrons inside atoms, but by applying voltage across the PN junction of LED, so that the PN junction itself forms an energy level, and then electrons jump on this energy level to generate photon emission. The service life of qualified LED under rated power should reach about 654.38+ million hours.

reference data

Shenlong studio Beginners learn digital SLR photography. Beijing: People's Posts and Telecommunications, 20 15.