Rokinon D970VL-C Digital Zoom TTL Flash with Video Light for Canon (Black) Guide Number (ISO100/105mm) 58(m)/145 feet at 105 position TTL auto focus, zoom position: 28,35,50,85, 105mm Bounce position: 0/45/60/75/90. Swivel: Left-180 Right-90 Recycle time: .5-9 sec requires 4x AA batteries not included Power ratio: 1/1, 1/2, 1/4, 1/8, 1/16, 1/32