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 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 Overhead 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)

34/111.5 (ISO 100, m/ft), 48/157.7 (ISO 200, m/ft)

+90 / -7 vertical, +180 / -180 horizontal

2.3s with NI-MH (2600 mAh)
3.0s with OxyrideTM (1.5V)
4.5s with Lithium (1.5V)
4.0s with Alkaline-manganese (1.5V)

3.0 x 5.7 x 4.7 in.

4 x Standard battery AA type, SD-9 High Performance Battery Pack, SD-8A High Performance Battery Pack