Flash Extender, Visual Echoes Better Beamer. Designed to be use with lenses 300 mm or longer and TTL flash units. Reporting gains of 2.5 to 3 stops in flash reach as benefit.
I am a handicap needing to shoot extreme distance with available light or flash from one central high gym working point. The flash used is Canon 430EX. The AL is shot at ISO 1800. The lenses are 3.5 and will not be upgraded until the market turns and gets good again. LOL
Primary purpose. Shooting high school sports with flash or AL and existing equipment. Shooting the Rebel XTI.