The lighting in the studio is very good. Why use a flash?

Is to increase the exposure of the photo moment.

Photographers think the lighting in the studio is very good, but they are deceived by the super-high sensitivity and super-wide tolerance of the naked eye. Light that often looks very bright, but recorded with a camera, the light is far from enough, and it can only be illuminated by the ultra-high brightness of the flash.

Extended data

The main functions of the flash:

1, outdoor fill light

The main function of the flash is to illuminate the scene in the case of insufficient light and obtain the correctly exposed image. Most digital cameras have an automatic flash option. When there is insufficient light in the scene, the flash will automatically pop up and flash.

2, improve the shutter speed

Flash is often used, not because the light is not enough to expose correctly, but to improve the shutter speed, so as to achieve the purpose of curing dynamic images. For example, shooting water droplets or moving portraits, if exposed according to ordinary photometric values, the images will be blurred and not clear enough, and these images can be solidified by flash.

Step 3 increase the depth of field

The depth of field effect of an image is closely related to the aperture size. Generally, the larger the aperture, the smaller the depth of field. Moreover, the aperture is small and the depth of field is large. Using this principle, you can actually use a flash to increase the depth of field. Sometimes, due to the limitation of light on the scene, we have to shoot with a large aperture, which effectively increases the depth of field.

Baidu encyclopedia -Flash