| Electronic construction |
| Automatic Insulated Gate Bipolar Transistor (IGBT) and series circuitry |
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| Guide number (20°C/68°F) |
| 34/111.5 (ISO 100, m/ft), 48/157.5 (ISO 200, m/ft) |
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| 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 |
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| 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) |
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| Flash mode |
| TTL, Auto Aperture flash, Non-TTL auto flash, Distance-priority manual flash, Manual flash, Repeating flash |
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| Other functions |
| Test firing, monitor pre-flashes, AF-assist illuminator, and Modeling illuminator |
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| Multiple flash operation |
| Advanced Wireless Lighting, SU-4 type wireless multiple flash |
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| Compatible cameras |
| All cameras compatible with Nikon Creative Lighting System (other cameras can be used but functionality is reduced) |
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| 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 |
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| 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° |
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| ON/OFF |
| Press the Power ON-OFF switch to turn the SB-900 on or off |
| Standby function can be set |
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| Power source/min. recycle time/no. of flashes (at full output) |
| With fresh batteries (These data may vary depending on battery condition) |
| Two AA-size penlight batteries (1.5V or lower) of the following types (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. |
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| * When firing the Speedlight at full output once every 30 seconds (120 seconds with lithium batteries.) |
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| Ready light |
| The SB-900 is fully recycled: Rear ready-light lights up and front light blinks |
| Insufficient light for correct exposure (in i-TTL, Auto Aperture flash, Non-TTL Auto flash, or Distance-priority manual flash operations): ready-lights and front lights blink after shooting |
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| Flash duration |
| Approx. 1/880 sec. at full output |
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| 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. |
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| Dimensions (W x H x D) |
| Approx. 78.0 x146.0 x 118.5 mm (3.0 x 5.7 x 4.7 in.) |
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| Weight (without batteries) |
| Approx. 415 g (14.6 oz.) |
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| 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 |
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| 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 |
