Ikelite SubStrobe 50s Underwater flash

The small strobe series with giant capabilities. These compact strobes now provide an unbelievable full 50 watt-seconds of electrical power. The size and color temperature leave almost nothing to be desired for macro photography, while the power and coverage allow use with lenses as wide as 28mm. The best price, recycle time, and most flashes per set of batteries in its class, with optional diffuser now available. This model provides 70-degree beam coverage. The Guide Number (ISO 100) for Surface/Underwater is 56/28.