i-TTL Balanced Fill-Flash
Advanced Wireless Lighting
AUTO FP High-Speed Sync
Flash Value Lock
Multi-Area AF-Assist Illuminator
Flash Color Information Communication
Switching Illumination Patterns
Image Area Selection
Firmware Update capability
Dedicated Accessories
Speedlight/Features Compatibility
Firmware can be uploaded via a Nikon digital camera (D3 or D700), assuming the SB-900 can accept technological upgrades.
