Some help with GN calculations
I want to know whta are the differences in STOPS between two different flash units with different GN's.
Lets say on has GN43 and the other is GN58.
If I put the bigger at 1/4 power, what will be the power I'll have to set the smaller one to get about the same output?
I think there is a 1 stop between those two, but I'm just guessing (square(58/43))= 1stop.
DIY photography stuff for product photography and