Minimum function

I had bought the set for off-camera flash. Unfortunately, the appliance can no longer trigger reliably as lightning. No camera information are transmitted, the flash fires always at full power. In this respect, one has no more influence on the depth of field because one is forced to close the iris completely and also to reduce the manual flash output. With open aperture as desired in portraits, I can not take a picture unless I put the flash in more than 20 meters in order to reduce the light output in this way. You need an eternal period of "trial and error", to perhaps even how to achieve a useful exposed photo.