I've been searching quite a lot lately in an effort to understand what the limits are for the 430 and 580 to overpower sun/bright afternoon ambient. I've come across tons of posts where the mathematics are broken down-really cool, academic stuff that I respect, but doesn't really help me visualize what the reality is. I know bigger strobes would do a better job, but really don't want to go that way due to portability/reality considerations.
What are the limits of these two flashes as far as overpowering the sun/daylight ambient goes? I'm also sort of wondering just how much small softboxes (like my 6" x 9" on-flash softbox) or something like a 40" umbrella would drop the output.
I think the best responses would be pictures at full power for these two flashes with the ambient dropped as far down as possible.