The Sigma Electronic Flash EF-630 is a multifunctional flash designed to work with current digital SLR cameras. Among its many features are TTL exposure control, high-speed sync, wireless flash functions, auto-zoom and bounce-flash. The flash automatically adjusts for focal lengths of 24mm to 200mm, making it ideal for wide angle and super-zoomed shots alike. The builtin Wide Panel can be utilized to cover an angle of up to that of a 17mm lens for ultra-wide angle shots. For multi-flash setups, you can use the Slave Flash Function to trigger additional flashes. Additional features include an intuitive user interface, a modeling flash function, AF assist light, and auto power-off. Visit sigmaphoto.com for further details and pricing.