Flash photography system

A flash photography system having a camera body, a main flash device and at least one sub-flash device, wherein said main flash device emits at least one low flash emission, serving as a main-flash emission command signal to said at least one sub-flash device, said flash photography system comprising:

• a designating device that designates a flash emission mode of a main-flash emission emitted by said at least one sub-flash device;
• and
• a command device that commands said main flash device to emit the at least one low flash emission, serving as the main-flash emission command signal, said at least one sub-flash device emitting the main-flash emission in accordance with the main-flash emission command signal and the designated flash emission mode;
• wherein, when said designating device designates a uniform flash emission mode, said command device commands said main flash device to emit at least two low flash emissions as the main-flash emission command signal;
• and
• wherein said at least one sub-flash device comprises:
• a receiver that receives the at least two low flash emissions from said main flash device;
• and
• a controller that controls said at least one sub-flash device to emit the main-flash emission for a designated duration, based on a time interval between two consecutive low flash emissions of the received low flash emissions, the main-flash emission having a substantially uniform intensity over the designated duration.