The built-in flash might be enough for average beginners, but the external flash is a must-have for professional photographers and some well-established photographers, especially in the room or in the light In case of insufficient use more.

When you have an external flash, you will find the photo clarity will be higher, especially in portrait photography, even if the ambient light is sufficient, the use of external flash will become more clear. If you are using natural light shooting, the skin is easy to have a sense of plastic, and use the flash can make up for this defect, of course, the effect is leveraged.