Rokinon D950AFZ-C Digital Zoom TTL Flash for Canon (Black) Guide Number (ISO100/DIN21) 42(m)/138 feet at 85 position TTL auto focus, zoom position: 28,35,50,85mm Bounce position: 0/45/60/75/90. Swivel: Left-180 Right-90 Recycle time: .5-8 sec Requires 4x AA batteries not included Red Eye reduction, built in diffuser and reflecting plate