With a rated guide number of 92' at ISO 100 and 35mm, the SB-700 AF Speedlight from Nikon is a moderately compact flash unit packed with features for high-performance on-camera lighting capabilities. The flash is compatible with the i-TTL system for automatic metering with both FX- and DX-format cameras and is optimized for use with Nikon's Creative Lighting System for complete control over your lighting setup. Additionally, the auto zoom head has a coverage range of 24-120mm with FX-format cameras which can be extended down to 12mm with the use of the built-in wide-angle diffusion panel. Complete bounce and swivel functionality is available for working in a variety of shooting situations. This allows users to tilt down to -7 and up to 90 as well as rotate left or right 180 for complete 360 coverage. Also, the SB-700 has three different illumination patterns, standard, even, and center-weighted, which help shape the light output for your specific needs. For wireless master TTL functionality, the speedlight utilizes a Commander Mode. In this mode users can access Advanced Wireless Lighting settings for controlling multiple off-camera flashes that can be set up in two groups (A, B) and one of four channels. The SB-700 also has a quick wireless control A:B ratio setting for quickly setting up and controlling multiple remote flashes.