Guide Number30m/98.4ft. (ISO 200, m/ft at 18mm zoom-head position, 20 degrees C/68 degrees F)
Electronic ConstructionAutomatic Insulated Gate Bipolar Transistor (IGBT) and series circuitry
Flash Exposure Control
Flash exposure control set on the camera: Slow-sync, red-eye reduction, red-eye reduction in slow sync, rear-curtain sync flash, FV lock flash, manual flash (with Nikon Creative Lighting System digital and 35mm SLR cameras).
i-TTL, M (manual with the D40 only)
Lens CoverageLight distribution covers an 18mm lens when mounted on a Nikon DX-format digital SLR camera (27mm lens when mounted on a D3's FX-format or the F6 35mm SLR)
Minimum Recycling Time3.9 sec. with Alkaline batteries; 4.2 with Lithium batteries, 3.1 with Oxyride batteries; 2.5 with Ni-MH batteries
Flash DurationApprox. 1/1, 300th second at full output.
Required Power SourceTwo AA batteries (1.5V or lower); Alkaline-manganese, Lithium, Oxyride or Ni-MH rechargeable (2600mAh 1.2v)
Supplied AccessoriesSS-400 Soft case
WeightApprox. 4.5 oz. (without batteries)
Minimum Number of FlashesApprox. 140