The Sunpak DF3600U flash is the perfect accessory for modern Canon and Nikon digital SLR cameras. The DF3600U is designed to use one flash for both Canon and Nikon DSLR and HDSLR cameras. It has many advanced features, such as automatic zoom head from 28mm to 180mm, built-in wide angle panel and bounce card, as well as a built-in slave, for Canon and Nikon systems. It also has an easy-to-use LCD panel. In low light, the AF assist makes sure you do not miss the shot when light levels get low. Other features of the DF3600 include GN of 120 at ISO100, metal hot shoe, built-in sync port and high-speed sync.