Specifically designed to work with Leica's range of cameras, a Leica Flash has been designed and manufactured with particular camera's in mind, so will give optimum performance when taking photographs in low light. Compact and lightweight, they have sophisticated electronics which couple through the camera's metering systems, to fine tune the flash output on each and every photograph. Not interference required, simply fix the Leica Flash to the camera's hotshoe, wait a few seconds for it to be fully charged and then press the shutter button.