The compact yet powerful nissin i60a flashgun has a guide number of 60m at iso 100200mm the zoom head covers focal lengths of 24 200mm which can be expanded to 16mm with the built in wide angle diffusion panel it is powered 4 aa batteries which will provide 220 full power bursts and there is also a power socket for using external battery packs following the success of the popular nissin i40 flashgun the nissin i60 flashgun has wireless slave ttl functionality which can be controlled b