The SF 64 is one of the world's most powerful compact and versatile flash units. Its high guide number of 64 at ISO 100/21° and a motor zoom for excellent flash coverage with focal lengths from 24 to 200 mm illuminates every subject. It also features a touch-screen colour display, a USB interface, a vertical (-9/+90°) and a horizontal (300°) reflector, and smart dual-reflector technology.