Nikon SB-900 Speedlight Flash

Features:
• Multi-step auto zoom covers wide 17-200mm zoom range (24-105mm:SB-800)
•Three illumination patterns (standard, centre-weighted and even) are available to match each shooting environment
• Automatically detects Nikon FX and Nikon DX formats and selects suitable light distribution
• Improved booster circuit for high-speed recycle time: Recycle time using four AA-size batteries is almost equal to the SB-800 with five AA-size batteries
• New AF-Assist illumination covers a wide 20-105 mm focal range compatible with the new Multi-CAM3000 FX/DX AF sensor
• Firmware update via Nikon D3 and D700 (world's first*)
• Thermal Cut-out function limits the number of flashes to avoid deterioration of light emitting parts caused by continuous flash firing
• Automatically detects colour filters (fluorescent or incandescent), enabling camera to control colour temperature according to filter information from SB-900
• Improved switch panel for enhanced usability
• Improved GUI using a large-size LCD dot panel
• Bounce capability: tilts up to 90¼, down to -7¼, rotates horizontally 180¼ to right and left
• Advanced Wireless Lighting and versatile functions for up to three remote SB-900s or other compatible Speedlight groups controlled through the master SB-900
• Optional Water Guard WG-AS1 (for D3), WG-AS2 (for D300), and WG-AS3 (for D700) is useful for protecting the camera's hot shoe contact when the SB-900 is mounted on a Nikon digital SLR camera