Ringlight flash specifically designed for use with Canon cameras with E-TTL and E-TTL II capabilities. Fine Macro mode provides highly precise light control from 1/128 to 1/1024 in 1/6 EV steps to achieve the greatest accuracy. Variable power in manual mode is 1/1 ? 1/64 minus 2/3 EV in 1/3 EV steps. Tube flash design works in conjunction with the expansion flash head, permitting the use of this flash on lenses ranging from 49mm to 82mm in diameter. Wireless TTL and multi-function remote control systems allow this flash to control slave groups with +/- 3 stops EV compensation. Firmware upgrades available through the USB service terminal. The color display features an easily navigable menu that automatically rotates depending on the camera?s orientation. Modeling LED lamp works in conjunction with the power ratio control feature to help better preview your lighting. Compatible with separately available Nissin PS 8 Ni-MH Battery Pack for Canon Camera.