The Nikon SB-900 is an advanced, high-performance Speedlight designed for Nikon's digital SLR cameras. It provides a wide 17-200mm auto zoom range, three illumination patterns, newly designed full-information LCD panel and AF-Assist illumination compatible with new generation AF sensors. The SB-900 boasts an improved booster circuit for high-speed recycle time. Firmware can also be uploaded via a Nikon digital SLR camera, assuring the SB-900 can accept technological advancements. The SB-900 supports Nikon�fs Advanced Wireless Lighting as a master or a remote Speedlight, allowing photographers to experiment with various photo-capturing experiences. A 180 degrees of left or right head swivel, a special built-in overheat protection system and automatic filter detection for white balance correction are also among the features found on the Nikon SB-900.