The Olympus FD-1 Flash Diffuser uses the Tough camera’s built in flash and redistributes the light to evenly illuminate closeup subjects or to light scenes. It is perfect for lighting macro shots in dark locations and for shooting moving subjects such as insects. Because it is equipped with a light output switching lever, you can adjust the lighting output in approximately 1.4 steps to match shooting conditions.The FD-1 flash diffuser can be used up to 15m underwater and is compatible with the TG-1 to TG-5 cameras.