The flash features complete ADI / P-TTL functionality, the Quick Shift Bounce system, wireless TTL control with ratio, and LED light, and a Quick Navi system with a large dot matrix LCD. Primarily, this unit sits at the top of its respective range due to the excellent guide number of 197’ at ISO 100 and 105mm. Also, the zoom head has a range of 24-105mm with full-frame cameras, which can be expanded to 15mm with the built-in wide-angle panel.