
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.
AF-Assist illumination: compatible with Multi-CAM3500 FX / DX AF sensors.
Bounce capability: rotates horizontally 180º to right and left, tilts up to 90º and down to 11º.
Thermal protection system: programmable to warn of excessive heat build up during high intensity firing.
Automatic filter detection: Speedlight automatically adjusts the attached camera’s white balance settings when a fluorescent or incandescent color filter is used.