.When you want to fill in shadows or add light to your subject in a dark or low-light setting.
2.Don’t need a handheld light meter
3.Flash sync is a computer-controlled system that synchronizes your flash and shutter release.
4.Evaluative through the lens
5.Black bands are the result of your shutter curtain blocking a part of the image during the exposure.
6.Bounce flash diffusers provide a different approach to softening the light.
7.In photography, a slave unit is a flash accessory that is used to fire another flash remotely
8.Lower the ISO, ISO determines the sensitivity of the camera sensor