Neewer NW-565 EXN I-TTL Slave Speedlite with Flash Bounce Diffuser for Nikon D4, D3s, D3x, D300s, D200, D100, D80, D70s, D3200, D3100, D3000, D60, D40X, D800, D7100 and All Other Nikon Models An excellent companion for your top of the line Nikon 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 180 mm 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, 180 mm Speedlite NW565EXN was specifically designed and engineered to perfectly accommodate your Nikon Digital SLR Camera, with other additional function: PC synchronous, sniff mode, over temperatures protection.