Electronic construction
Automatic Insulated Gate Bipolar Transistor (IGBT) and series circuitry
Guide number (20°C/68°F)
18/59 (ISO 100, m/ft)
Angle of coverage
Covers angle of view of 27 mm lens (FX format) or 18 mm lens (DX format)
Effective flash range (i-TTL)
0.6 m to 20 m (2 ft to 66 ft); varies with ISO sensitivity, bounce angle, and aperture
Options available using camera controls
  • Flash control mode: i-TTL, manual
  • Flash mode: Fill flash (front-curtain sync), front-curtain with slow sync, rear- curtain sync, and rear-curtain with slow sync
Bounce angle
Flash rotates vertically up to 120° with stops where the flash is pointing directly ahead and at 60°, 75°, 90°, and 120°
Device on/off
Power switch used to turn SB-300 on and off
Power source
Two AAA alkaline or NiMH batteries
Flash-ready light
  • Charging complete: Lights
  • Warning: Blinks
Flash duration
Lights for about 1/1650 s when fired at full power
Batter endurance and flash recycling time*1
Battery type
Minimum recycling time*2
Endurance*3/recycling time*2
Approx. 4.0 s
70 or more uses/4.0-30 s
Approx. 3.5 s
110 or more uses/3.5-30 s
Mounting foot lock lever
Locking pin prevents accidental detachment
Other options
Thermal cut-out, firmware update*4
Dimensions (W x H x D)
Approx. 57.4 x 65.4 x 62.3 mm (2.3 x 2.6 x 2.5 in.)
  • Approx. 120 g (4.2 oz), including two AAA alkaline batteries
  • Approx. 97 g (3.4 oz), body only
Supplied accessories
Soft Case SS-DC1
  • *1Figures are for fresh batteries; actual results may vary with performance and other factors even among batteries of identical ages and makes.
  • *2Time between flash firing at full power and flash-ready light illuminating when flash is fired once every 30 s.
  • *3Number of times flash can be fired at full power with flash-ready light illuminating within 30 s.
  • *4Firmware can be updated from camera.