SPECIFICATIONS Guide number: 53/m(174/ft) ISO 100/m(with the zoom head at 105mm) ZOOM 24mm 28mm 35mm 50mm 70mm 85mm 105mm G.N.(m) 28 29 31 40 45 48 53 G.N.(ft) 92 95 102 132 149 158 174 Power source Four AA alkaline or AA NiCd or Ni-MH (Nikel Metal Hybride) batteries Charging time 6 seconds (when using alkaline batteries)Approx. 4 seconds (when using NiCd, Ni-MH batteries) Number of flashes Approx. 220 flashes (when using alkaline batteries) Approx. 100 flashes (when using NiCd, Ni-MH batteries) Illumination angle Automatically set in accordance with the focal length of the lens, in a range from 24 …