Nikon SB 900 Speedlight

Nikon SB 900 Speedlight ... opportunities for their flash photography. Three illumination patterns - Center-weighted, Even and Standard - provide total control over flash coverage and it covers a class-leading auto zoom range of 17-200mm in just 1.2 seconds.

Advanced features include a booster circuit that enables high-speed recycling using four AA-type batteries and a built-in thermal protection system to warn of excessive heat build up. The SB-900 can automatically detect the presence of a fluorescent or incandescent color filter and transmit this information to the attached camera's white balance setting, and its firmware can be upgraded via the camera body.