Powerful, Versatile Speedlight Unit Atop the Nikon Creative Lighting System, the SB-900 is an indispensable portable light source providing effective solutions to lighting challenges. Nikon’s Precision i-TTL Flash Control Delivers precise flash exposures and seamless fill-flash performance—even in challenging lighting situations. Complete Flash Head Positioning Freedom Bounce 90°up and 7°down with 360° rotation elevates creative lighting freedom. Hot Shoe and Wireless Operation Use on-camera, as a wireless Master Commander or as a wireless remote light source. Renowned Dedicated Wireless Flash Control Wireless Commander Mode offers wireless control at the master Speedlight position, controlling up to 3 remote Speedlight groups and an unlimited number of compatible Speedlights. Four wireless channel options help manage wireless conflicts in multi-photographer environments. Expanded Auto Power Zoom Coverage Smoothly covers lenses as wide as 17mm and up to 200mm in FX-format and as wide as 12mm and up to 200mm in DX-format use. Choose From 3 Light Distribution Patterns Optimize light quality by selecting Standard for general illumination, Center-weighted for portraits or Even, for groups or interiors. Streamlined Controls and Menus Convenient Rotary Select Dial sets key functions quickly and a prominent Master and Remote control switch simplifies wireless operation. Color Gel Filter Identification Automatically identifies mounted color gel filters and adjusts camera white-balance.* *With select Nikon digital SLRs Flash Tube Overheat Protection An added measure of safety is provided for sustained high-speed bursts. Automatic Format Identification Automatically senses the FX or DX-format camera in use and optimizes light distribution. Flash Value (FV) Lock Locks in a specific flash output on the main subject, regardless of aperture, composition or the lens’ zoom position.* *With select Nikon digital SLRs Firmware Updating Allows uploading of performance enhancement developments.* *With select Nikon digital SLRs