Olympus FL-900R Flash

This high performance flash features a dust-, splash- and freezeproof (-10°C) construction in a compact and lightweight housing. When combined with the weather sealed cameras of the OM-D series, and M.ZUIKO PRO lenses, you do not need to worry about shooting in harsh environments. 
This high-intensity flagship flash comes with a maximum guide number of 58, while the combination of the camera's built-in image processor (TruePic) with the TTL synchronization technology enables optimal lighting during your photo shootings. 
As the flash is equipped with a wireless lightning mode you can make use of high-intensity multi-flash photography via wireless control, which enables you to control up to 4 flash groups, to select whether a group fires or not, to compensate for the flash output, and to adjust various settings. One other very well accepted extra is the slave function- you can simply attach the flash to the hot shoe of a camera and use it as the master flash while using the commander function. 
Of course the unique Olympus High Res. Shot, Focus Stacking, and Focus Bracketing functions are supported too and shorter shooting intervals than before are now available!
The FL-900R is equipped with an LED light for movies, which is effective for shooting OM-D Movies in low light or backlit conditions. Perfect for lenses with a focal length of 12mm (24mm*) or higher.