The high-performance Nikon SB-900 AF Speedlight (Flash) offers a powerful guide number of 48 meters/157.5 feet (ISO 200) and an incredible array of creative flash functions. It provides a wide 17-200 mm auto zoom range, the flash head tilts down to -7 degrees or up to 90 degrees with rotates horizontally 180 degrees to the left and right, elevates creative lighting freedom.
The SB-900 can work as a stand-alone flash, or you can use it as a commander or wireless remote light source. The i-TTL system in this flash supports Advanced Wireless Lighting and versatile functions for up to four groups of Speedlights, with 3 remote i-TTL Speedlight groups controlled through the master SB-900. i-TTL Balanced Fill-Flash flash control employs Nikon's Advanced Data Communication system. This system provides an improved method for the monitor pre-flash and wireless operation that marks an evolution in higher precision over Nikon's acclaimed D-TTL Balanced Fill-Flash control system, and forms the core of the Creative Lighting System.