The Nikon Speedlight SB-800.

The new i-TTL Flash Control system supports automatic balanced fill flash that delivers outstanding results as well as new creative possibilities. i-TTL Balanced Fill-Flash flash control employs Nikon's new Advanced Data Communication system to introduce an improved method for the monitor pre-flash and wireless operation that marks an evolution in higher precision over Nikon's acclaimed D-TTL Balanced Fill-Flash control system and forms the core of the new Creative Lighting System.

The Nikon Speedlight SB-800 makes Advanced Wireless Lighting as easy to use as a single on-camera speedlight, inviting professional and advanced amateur photographers to explore the unlimited creative possibilities. Advanced Wireless Lighting lets you divide SB-800 Speedlights into 4 groups, including the Master and 3 remote i-TTL speedlight groups, to achieve total lighting control. All groups can be controlled from the Master, including independent flash mode ([TTL] / [AA] / [A] / [M]) settings and any-time adjustment of flash output level compensation values for each group. Each of the three remote groups can contain any number of Speedlights, giving photographers full control over how they illuminate the background.

A new Modeling Flash allows photographers to visually preview the lighting effects for all groups of speedlights when using Advanced Wireless Lighting to shoot with multiple flash units, a great aid in achieving the exact lighting desired.