Neewer NW565EX E-TTL Slave Flash Speedlite with Flash Diffuser for Canon 5D Mark III,5D Mark II,7D,30D,40D,50D,300D,350D,400D,500D,550D,600D,700D,1000D,1100D and Other Canon DSLR Cameras An excellent companion for your top of the line Canon digital SLR camera, letting you produce amazing and breathtaking photography Super fast recharging cycle, 2.9 second charging cycle after a full level output, can be accelerated by an external power pack Auto/Manual zooming, covering a length range of 18 to 180mm and supporting full-frame and half-frame cameras With its advanced TTL functions, wireless flash system, and many other capabilities. TTL flash index: 58 ISO100, 180mm Speedlite NW565EXC was specifically designed and engineered to perfectly accommodate your Canon Digital SLR Camera, with other additional function: PC synchronous, sniff mode, over temperatures protection.