In combination with the RFS 2.2 transmitter, you can use all Siros L monolights with extremely fast shutter speeds. For example, with ambient light, even with the aperture wide open (selective focus), the image can be underexposed correctly with up to 
1/8000 s and Siros L still lets you set dominant and creative light effects.

All you need for this is the RFS 2.2 transmitter, which is available for Canon, Fujifilm, Nikon and Sony cameras. In addition, “HS” must be activated on all Siros L units. This modifies the flash curve and guarantees, in combination with RFS 2.2, correct exposure with no limits on your choice of shutter speed.

Please read the operating instructions for the RFS 2.2 transmitter to learn more about optimum use of the “HS” function.
While working in “HS” mode you are only able to use flash power level 4 to 10 with Siros L.