Sometimes the ambient light level is too low for successful for photography, or it’s the ‘wrong’ kind of light. This is where photographers turn to flash (or ‘strobe’, if you’re in the US). Flash works by emitting a very short, very powerful burst of light. Energy is stored in a capacitor in the flash head […]
If you use off-camera flash, the camera needs some way to trigger it. These days this is usually done by wireless control, either using infra-red control or radio signals.