Although it plays only a secondary role in still photography, the time between flash discharge and the next possible flash is important in dynamic applications. Fast recharging provides for rapid image sequencing, a flash that is ready at all times and short reaction times. The performance range of modern flash technology includes the auxiliary reflector as an additional source of reduced frontal lighting. Higher flashing rates can be achieved with the motor-driven version. In some units, the light output can be reduced individually, which is good for close-ups, macrophotographs and special effects.
Some flashes offer a so-called slave function.
Just like in professional photography, only one unit is synchronized with the camera. The other units placed as desired around the room go off at the same time, including the TTL flash controller. Thus, a mini-flash studio is available for when you're on the road and, what's worthy of special mention, it consists of a computer flash which has been reduced to unbeatable small dimensions and is super light. The latest units are, of course, equipped with an LCD display which provides all this information in detail. Flash motifs appear to have greater definition.