The SB-900 i-TTL Speedlight leads the Nikon Creative Lighting System delivering the portability, power and versatility to support any photographer's creative lighting imagination. Powerful and versatile SB-900 works as a stand-alone flash, featuring wireless operation as a Commander or wireless remote light source.
Quick Glance
Compatible Camera: Nikon Digital Cameras: D300 D80 D60 D40 D3 D700 D90 D3X COOLPIX P6000
Flash Mode: Manual, Automatic, TTL
Compatibility
Compatible Camera Model(s): Nikon Digital Cameras: D300 D80 D60 D40 D3 D700 D90 D3X COOLPIX P6000
Flash Mode: Manual, Automatic, TTL
Performance
Guide Number: 34 m/365.8 ft at ISO 100, 48 m/516.7 ft at ISO 200
Flash Coverage: 17 mm to 200 mm FX-format, Automatic mode, 12 mm to 200 mm DX-format, Automatic mode, 12 mm to 17 mm FX-format, Automatic mode with built-in wide-angle panel deployed, 8 mm to 11 mm DX-format, Automatic mode with built-in wide-angle panel deployed
Flash Recycle Time: 4 Second - Alkaline-manganese, 4.5 Second - Lithium Batteries, 3 Second - Oxyride Batteries, 2.3 Second - Ni-MH Batteries
General
Dimensions: 3" x 5.70" x 4.70"
Weight: 14.60 oz
URL: Manufacturer Link
Additional Specifications
Mount Type: Shoe Mount
Number of Batteries Support: 16
Minimum Flash Recycle Time: 2.3 Second
Not Perfect, but close
Strengths: Quick Recycle time, Easy menu, POWER and MORE POWER
Weakness: Price, Size (it's considerably larger then the SB-800)
I'm an owner of a SB-800 and love the flash, and would've gotten another if the model hadn't been discontinued. This flash was going to be my back-up, but after a few sessions it's now my primary flash. The biggest advantages I've found are the quick recycle time (minus a 5th battery needed for the SB-800) and menu navigation.