Specifications:

Electronic construction: Automatic Insulated Gate Bipolar Transistor (IGBT) and series circuitry

Guide number: (at 18mm zoom-head position, 20 degrees C/68 degrees F) 30m/98.4ft. (ISO 200, m/ft)

Angle of coverage: Light distribution covers an 18mm lens when mounted on a Nikon DX format digital SLR camera (27mm lens when mounted on an F6 35mm SLR)

Flash shooting distance range: 2 to 66 feet (Varies depending on the ISO sensitivity, zoom-head position, and lens aperture in use)

Flash mode: i-TTL, M (manual with the D40 only )

Compatible cameras: All cameras compatible with Nikon Creative Lighting System

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)

Bounce capability: Flash head tilts up to 90 degrees with click-stops at 0, 60, 75, 90 degrees.

Power Source: Two AA batteries (1.5V or lower)

Number of flashes/Recycling time (at full output with fresh batteries): Alkaline-manganese (1.5V) 140/3.9 sec. Lithium (1.5V) 250/4.2 sec. Oxyride (1.5V) 150/3.1 sec.Ni-MH rechargeable (1.5V, 2600 mAh) 210/2.5 sec.

Ready light: Lights up when the SB-400 is recharged and ready to fire; blinks to indicate: insufficient light; insufficient battery power; incompatibility of camera with SB-400; overheating

Flash duration: Approximately 1/1,300th second at full output

Mounting foot lever lock: Provides secure attachment of SB-400 to the camera accessory shoe with a mount pin to prevent accidental detachment

Dimensions (W x H x D): Approximately 2.6 x 2.2 x 3.1 inches

Weight (without batteries): Approximately 4.5 oz.

Included accessory: SS-400 Soft case

Specification Conditions: Performance specifications are applicable when fresh batteries are used at normal temperature (20 degrees C/68 degrees F)

Specifications are subject to change without notice.