What's the use of a flash?

The functions of the flash are: 1, to fill the camera with light and improve the lighting conditions of the subject; 2. The auxiliary light source emphasizes skin color; 3. Pay attention to the photographer; 4. Instantly curing the main body; 5. Reflect light without destroying the scene environment of the subject. Flash is called "electronic flash" in Chinese, also called high-speed flash. It is also one of the ways to increase exposure, especially in dim places. Flash helps to make the scenery brighter.

Flash is a photographic accessory that can emit strong light in a short time. It is mostly used for instantaneous lighting in dark places, and it is also used for local lighting of the subject in bright places. Compact appearance, safe use, convenient carrying and stable performance.

Flash lamp is a kind of artificial light filling equipment. Its working principle is to store high-voltage electricity through a capacitor, and discharge the flash tube through pulse triggering to complete instantaneous flash.

However, because the continuous flash time of the flash is very short, the flash metering element used must be a photosensitive element with fast response ability to dim it.