Better Beamer The Flash X-Tender () FX-4 Flash Output Booster for the Nikon SB-600 and SB-800 Flashes with Lenses 300mm

Now there is an easy way to have the extra flash power you need in the field.The Flash X-Tender packs flat, weighs less than 3 ounces and sets up in 30 seconds and your flash output is extended a minimum of 2 full f-stops! Bring your birds and animals to life with an eye highlight.Used and praised by nature photographers world-wide.When used with TTL (Through-The-Lens) flash metering, exposure is automatically handled by your camera and flash, and no special compensation is required.'