Bounce flash and huge venues - how to double your flash power

A spontaneous moment with two of the lovely people at an event I photographed. Perhaps technically unremarkable until you consider the size of the venue, and that I used bounce flash. If you look at the photo below, you'll see that it was a huge indoor basketball / sport court. Now, if you're familiar with the tutorials on this site on bounce flash photography, you'll know that I try to avoid direct flash as much as possible. Even flash attachments that throw light forward -- I avoid using those. Instead, I much more  Read more inside...