The Olympus FL-900R weatherproof high-intensity flash boasts a guide number of 58m (at ISO 100) and covers a wide range of focal lengths with its electronic zoom head. The built-in wide panel enables you to use wider focal length lenses and have perfect coverage, and a catch light panel beautifully illuminates portrait subjects' eyes, even outside in the elements. And with its built-in LED light, the FL-900R is a useful tool as a continuous light source for video shooting.