Camera Flash / Speedlight: Nikon SB-900 Speedlight Flash Unit Flashgun
Model Name: Nikon SB-900 Speedlight Flash Unit Flashgun
Image:Nikon SB-900 Speedlight Flash Unit Flashgun
Fivercam Price (used) UK
eBay Price (used) UK
Release Date30 June 2008
Strenght / Power
Guide Number (ISO100, meters) Flash Specs 111.5' / 33.99 m ISO 100 at 35 mm Position
Power Level Switching (Vari-power Range)1/1 to 1/128
Head & Coverage
Bounce (Up-Down) Head MovementYes
Swivel (Rotation) Head movementYes
Focal Length Coverage Flash Specs 104° - 12° Wide-Angle Adapter: 122° - 104°
Auto Zoom Head Flash Specs Full Frame: 17 - 200 mm
Flash Related Functions
Flash Durations Flash Specs
Flash Modes(TTL) Flash Specs Yes (only supports i-TTL)
Flash Exposure Compensation / Correction Flash Specs
Secondary Illumination Flash Specs
Wireles Flash
Wireless Operation Flash Specs
Wireless Groups Flash Specs
Wireless Channels
Remote Timing Modes
Other Features
MountHot-shoe mount flash
Off Camera Terminal / External ConnectorsProprietary
Included Accessories
Other Functions
Power Source & Recycle Time
Power Source - Batterry4 x AA Alkaline, Lithium, NiCad, Rechargeable NiMH Batteries
External Power
Minimum Recycle Time (Charging time between shooting) Flash Specs Approximately 2.3 to 4.5 Seconds
Battery Life Flash SpecsNumber of flashes at full power: 110 per set of alkalines, 190 per charge of 2,600 mAh NiMH
Dimensions & Weight
Dimensions3.0 x 5.7 x 4.7" / 7.6 x 14.5 x 11.9 cm
Weight14.6 oz / 413.9 g
More Details or Support Website: Link
Item 1
Fivercam Wiki information:

There are three ways to trigger off-camera flash units wirelessly: via infrared, radio signals or a hybrid method that involves both infrared and radio. The infrared system works like the TV remote; there need to be a direct line of sight for the signal to reach the destination. The radio signal has no line-of-sight limitations, but comes at a rather high cost. The hybrid system simply takes the infrared signal from the commander, converts it over to radio and then converts it back to infrared on slave units.

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