Control up to three remote Speedlight groups and an unlimited number of compatible Speedlights: The SB-900's Wireless Commander Mode offers wireless control at the master Speedlight position. Four wireless channel options allow you to manage wireless conflicts in multiple photographer environments.

Streamlined controls and menus: The Rotary Select Dial sets key flash functions quickly?a prominent Master and Remote control switch simplifies wireless operation.

FX/DX format identification: Automatic FX/DX switching optimizes light distribution angle.

Expanded Auto Power Zoom Coverage: The SB-900 provides zoom coverage from 17-200mm in the FX-format and 12-200mm coverage in the DX-format.

Choose from 3 light distribution patterns: Improve light quality by selecting Standard for general illumination, Center-weighted for portraits, or Even for groups or interiors.

User-friendly firmware updating: Allows uploading of performance enhancement developments to the SB-900 with select Nikon digital SLR cameras.

Color gel filter identification: The SB-900 automatically identifies mounted color gel filters and adjusts the camera's auto white-balance setting with select Nikon digital SLR cameras.

Flash Tube Overheat Protection: An added measure of safety is provided for sustained high-speed bursts.

Drip-proof mounting foot cover (Water Guard): for enhanced moisture protection (optional).