A perfect solution for macro work both stills and video the aputure amaran halo led ringlight is available in two dedicated fittings canon and nikon using 100 leds it can be used either as a continuous light source choosing between the full array of lights or just the left or right half or as a non ttl flash where the power can be adjusted between full half and quarter output again full or left and right halves the unit is powered by four aa batteries not included and includes eight l