| Electronic construction | Automatic Insulated Gate Bipolar Transistor (IGBT) and series circuitry |
| Guide number (20°C/68°F) | 34/111.5 (ISO 100, m/ft), 48/157.5 (ISO 200, m/ft) |
| Illumination pattern | Three illumination patterns: standard, even and center-weighted. The light distribution angle is automatically adjusted to the camera's image area in both FX and DX formats |
| Flash shooting distance range | 0.6 m to 20 m (2 to 66 ft) (varies depending on camera image area setting, illumination pattern, ISO sensitivity, zoom position, and lens aperture) |
| Flash mode | TTL, Auto Aperture flash, Non-TTL auto flash, Distance-priority manual flash, Manual flash, Repeating flash |
| Other functions | Test firing, monitor pre-flashes, AF-assist illuminator, and Modeling illuminator |
| Multiple flash operation | Advanced Wireless Lighting, SU-4 type wireless multiple flash |
| Compatible cameras | All cameras compatible with Nikon Creative Lighting System (other cameras can be used but functionality is reduced) |
| Flash exposure control set on the camera | Camera's sync modes: Slow-sync, Red-eye reduction in slow-sync, Rear-curtain sync, Rear-curtain slow-sync Shooting functions: Auto FP High-Speed sync, FV Lock flash |
| Bounce capability | Flash head tilts down to -7° or up to 90° with click-stops at -7°, 0°, 45°, 60°, 75°, 90° Flash head rotates horizontally 180° to the left and right with click-stops at 0°, 30°, 60°, 90°, 120°, 150°, 180° |
| ON/OFF | Press the Power ON-OFF switch to turn the SB-900 on or off (Standby function can be set) |
| Power source | Four AA-size penlight batteries (1.5V or lower) |
| Battery Performance | Batteries: Min. recycle time (approx.)* / Min number of flashes* / interval between full flash output and ready light on**:- Alkaline-manganese (1.5V) : 4.0 sec. / 110 / 4.0-30 sec.
- Lithium (1.5V) : 4.5 sec. / 230 / 4.5-120 sec.
- Oxyride (1.5V) : 3.0 sec. / 125 / 3.0-30 sec.
- Ni-MH (2600 mAh) (rechargeable) (1.2V) : 2.3 sec. / 190 / 2.3-30 sec.
* With fresh batteries (The data may vary depending on battery condition) ** When firing the Speedlight at full output once every 30 seconds (120 seconds with lithium batteries.) |
| Ready light | The SB-900 is fully recycled: Rear ready-light lights up and front light blinks
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| Flash duration | Approx. 1/880 sec. at full output |
| Mounting foot lock lever | Provides secure attachment of SB-900 to camera's accessory shoe using locking plate and mount pin to prevent accidental detachment. |
| Dimensions (W x H x D) | Approx. 78.0 x146.0 x 118.5 mm (3.0 x 5.7 x 4.7 in.) |
| Weight (without batteries) | Approx. 415 g (14.6 oz.) |
| Supplied accessories | Speedlight Stand AS-21, Nikon Diffusion Dome SW-13H, Color Filter Set SJ-900, Color Filter Holder SZ-2, Soft Case SS-900 |
| Optional accessories | Color Filter Set SJ-3, Water Guard WG-AS1/WG-AS2/WG-AS3, High-Performance Battery Pack SD-9, Wireless Slave Flash Controller SU-4, TTL Remote Cord SC-28/SC-29 |