I'm a newb in macro, just ordered a lens and look forward to focus stacking some flowers (many thanks, LordV) All I have is speedlites and want to stay away from the bulk of a flash bracket (unless I can be convinced that they're not bulky)
I see that with the MR14-ex, you can fire the flash tubes @ a ratio (4:1, 2:1, etc.) But it looks like the Sigma EM140 is the same and little cheaper. For anyone who's owned the Sigma, what do you think about it? Can you also fire one tube @ a lower power than the other?

