Nikon SB900 Specs

·         Commander Function

Yes

·         Remote Function

Yes

·         Guide Number

34 m/111.5 ft. (at ISO 100, 35mm zoom head position, in FX format, standard illumination pattern, 20°C/68°F) to 48 m/157.5 ft. (at ISO 200, 35mm zoom head position, in FX format, standard illumination pattern, 20°C/68°F)

·         Electronic Construction

Automatic Insulated Gate Bipolar Transistor (IGBT) and series circuitry

·         Flash Exposure Control

Distance-priority manual flash 
i-TTL Balanced Fill-Flash with CLS compatible cameras 
Manual Flash (with Nikon Creative Lighting System digital and 35mm SLR cameras)

·         Lens Coverage

8 to 11mm (DX-format, Automatic mode with built-in wide-angle panel deployed) 
12 to 17mm (FX-format, Automatic mode with built-in wide-angle panel deployed) 
12 to 200mm (DX-format, Automatic mode) 
17 to 200mm (FX-format, Automatic mode)

·         Illumination pattern

The light distribution angle is automatically adjusted to the camera’s image area in both FX and DX formats 
Standard 
Even 
Center-weighted

·         Other Available Functions

Test Firing 
Monitor Pre-flashes 
AF-assist illuminator 
Modeling illuminator

·         Bounce Function (Tilt)

Flash head tilts down to -7° or up to 90° with click-stops at -7°, 0°, 45°, 60°, 75°, 90°.

·         Bounce Function (Rotate)

Flash head rotates horizontally 180° to the left and right with click-stops at 0°, 30°, 60°, 75°, 90°, 120°, 150°, 180°

·         Minimum Recycling Time

2.3 sec. (approx.) with Ni-MH (2600 mAh) batteries 
3.0 sec. (approx.) with Oxyride™ (1.5V) batteries 
4.0 sec. (approx.) with Alkaline-manganese (1.5V) batteries 
4.5 sec. (approx.) with Lithium (1.5V) batteries

·         Flash Duration

1/880 sec. at M 1/1 (full) output 
1/1100 sec. at M 1/2 output 
1/2550 sec. at M 1/4 output 
1/5000 sec. at M 1/8 output 
1/10000 sec. at M 1/16 output 
1/20000 sec. at M 1/32 output 
1/35700 sec. at M 1/64 output 
1/38500 sec. at M 1/128 output

·         Power ON/OFF

Rotate the Power ON/OFF switch to turn the SB-900 on or off.

·         Required Power Source

Four 1.2V Ni-MH (AA-size) batteries 
Four 1.5V Alkaline-manganese (AA-size) batteries 
Four 1.5V Lithium (AA-size) batteries

·         Optional Power Supply

SK-6 Power Bracket Unit 
SD-8A High-Performance Battery Pack 
SD-9 High-Performance Battery Pack

·         Flash-ready Indicator

Rear and Front lights blink: Insufficient light for correct exposure (in i-TTL, Auto Aperture flash, Non-TTL Auto flash, or Distance-priority manual flash operations). 
Rear lights up and Front blinks: recycled and ready to fire.

·         Ready Light

Front 
Back

·         Flash Compensation

–3.0 EV to +3.0 EV in increments of 1/3 steps in i-TTL auto flash, Auto Aperture flash, Non-TTL auto flash and Distance-priority manual flash modes

·         Custom Setting

AF-Assist Illumination 
Modeling Illuminator 
Monitor pre-flashes 
Test firing

·         Minimum Number of Flashes / Recycling Time

110/4.0 – 30 sec. (1.5V Alkaline-manganese) 
125/3.0 –30 sec. (1.5V Oxyride™) 
165/2.3–30 sec. (Ni-MH (eneloop)) 
190/2.3–30 sec. (2600mAh Ni-MH) 
230/4.5–120 sec. (1.5V Lithium)

·         Wireless Flash Modes

Master 
Master (RPT) 
Off 
Remote 
SU-4

·         Wireless Communication Channels

Four: 1, 2, 3 and 4 Channels

·         Wireless Groups

Three: A, B and C

·         Other Functions

Firmware update 
ISO sensitivity setting 
Key lock 
Recalling the underexposure value in the TTL auto flash mode 
Resetting the settings 
Thermal cut-out

·         Dimensions

3.0 x 5.7 x 4.7 in. (78.0 x 146.0 x 118.5 mm) (Approx.)

·         Weight (Approx. without batteries)

14.6 oz. (415 g)

·         Supplied Accessories

o    AS-21 Speedlight Stand

o    SW-13H Diffusion Dome

o    SJ-900 Color Filter Set

o    SZ-2 Color Filter Holder

o    SS-900 Soft Case