Help me if you can. I have used plenty of different monolight strobes in my studio in the past.
Mostly Novatron M300 and some Britek lights also.,
Now I have two Interfit EX300 lights. One light has a 24x24 in soft box and the other light has a 45 in tall strip light box. My camera is a Nikon D300s Manual mode: shutter 1/250 and aperture f/8
Here's what is happening. When I shoot using only one light...it works fine. But if I am set up with two lights ( sync cord to one light and second light firing off the flash of first light)...one light seems to not fire at full power. I have even set up were Im shooting so that the softboxes are in the picture and I can see that one is not as bright as the other. It is obvious that one is not firing bright enough as that side of the subject doesn't show enough light.
If i fire just one strobe by itself...it fires just fine with expected power/light output.
Whats happening? Any ideas.