Ideal for use with Nikon speedlights in multiple flash lighting setups to reduce background shadows, provide a second light for fill or main light purposes, and for background or accent lights.

When connected to an accessory, the Nikon SU4 TTL Flash Controller enables wireless TTL multiple flash control while using the Cameras built-in Speedlight as a master unit.

The Diffuser SG-2 is provided to reduce the flash output of the built-in Speedlight.