Nikon SpeedLight SB-910 (Brand New)

Key Features

• Fully compatible with Nikon Creative Lighting System Three
  illumination patterns (standard/even/center-weighted), with increased
  light distribution accuracy, are available to match every shooting
  environment Automatically detects Nikon FX and Nikon DX formats and
  selects suitable light distribution angles Power zoom function covers
  wide 17-200 mm (in FX format) or 12-200 mm (in DX format) zoom ranges
  AF-assist illumination, compatible with multi-point AF system, covers
  wide 17-135 mm focal length range New MENU button enables quick
  access to custom settings, while improved LCD panel GUI (graphical
  user interface) enhances operability Durable and heat-resistant,
  easy-to-use, hard-type color filters (fluorescent or incandescent)
  included Automatically detects color filter types and transmits
  filter information to camera for optimum white balance setting Guide
  number: 34/111.5 (m/ft.) at 35 mm and 53/173.9 (m/ft.) at 200 mm
  (FX-format, standard illumination pattern, ISO 100, 20°C/68°F)
  Minimum recycling time: approx. 2.3 seconds with Ni-MH batteries
  Automatically detects increases in flash head temperature and
  controls recycling time accordingly, thus preventing overheating
  Firmware updates via Nikon digital SLR cameras Compatible with
  High-Performance Battery Pack SD-9 and Power Bracket Unit SK-6/6A
  Optional Water Guards WG-AS1 (for D3 series), WG-AS2 (for D300
  series) and WG-AS3 (for D700) protect camera accessory shoe contact
  when SB-910 is mounted on Nikon digital SLR cameras