Specifications

• Guide Number
  21m/69ft. (at ISO 100, 18mm zoom-head position, 20°C/68°F) to 30m/98.4ft. (at ISO 200, 18mm zoom-head position, 20°C/68°F)
   
• Electronic Construction
  Automatic Insulated Gate Bipolar Transistor (IGBT) and series circuitry
   
• Flash Exposure Control
  i-TTL Balanced Fill-Flash with CLS compatible cameras
  Manual
  Manual Flash (with Nikon Creative Lighting System digital and 35mm SLR cameras)
  Shooting options: FV Lock Flash
  Red-eye reduction
  Red-eye reduction in Slow-sync
  Rear-curtain sync
  Slow-sync
   
• Lens Coverage
  18mm (DX-format)
  27mm (on a Nikon F6)
   
• Bounce Function (Tilt)
  Flash head tilts up to 90° with click-stops at 0°, 60°, 75°, 90°.
   
• Minimum Recycling Time
  2.5 sec. (approx.) with Ni-MH batteries
  3.1 sec. (approx.) with Oxyride™ batteries
  3.9 sec. (approx.) with Alkaline batteries
  4.2 sec. (approx.) with Lithium batteries
   
• Flash Duration
  1/300 sec. at M 1/1 (full) output. (Approx.)
   
• Power ON/OFF
  Turn the SB-400 on and off using the ON/OFF switch.
   
• Required Power Source
  Two 1.5V or lower (Alkaline-manganese, Lithium, Oxyride) batteries
  Two 1.2V 2600mAh (Ni-MH rechargeable) batteries
   
• Optional Power Supply
  No
   
• Flash-ready Indicator
  Blinks: insufficient light, insufficient battery power, incompatibility of camera with SB-400 or overheating.
   
• Ready Light
  Back
   
• Minimum Number of Flashes / Recycling Time
  210/2.5-30 sec. (1.2V Ni-MH)
  90/4–30 sec. (1000mAh NiCd)
  150/3.1-30 sec. (1.5V Oxyride™)
  250/4.2-30 sec. (1.5V Lithium)
  140/3.9-30 sec. (1.5V Alkaline-manganese)
   
• Wireless Communication Channels
  NoChannels
   
• Wireless Groups
  No
   
• Dimensions
  2.6 x 2.2 x 3.1 in. (66 x 56.5 x 80mm)
   
• Weight (Approx. without batteries)
  4.5 oz. (128g)
   
• Supplied Accessories
  • SS-400 Soft case