Gary Fong GFLSC01 LightSphere Collapsible Diffuser
Gary Fong is a well-respected wedding and portrait photographer who, incorporating his experience, developed a flash diffuser that is widely endorsed by many for run and gun shooting such as weddings and event photography. He also offers videos at his website on how best to use his diffuser. Unlike earlier versions that were not collapsible and were dedicated to specific flash heads, this newest version is pretty universal and collapses to fit neatly into even a small camera bag. Its one-size-fits-all design lets you swap between flash heads and it wont become obsolete should you change flash heads or camera systems. The downside is that, because the diffuser is designed to fit the median flash head profile, it tends to be a little loose on some flashes meaning it might unexpectedly slip off your flash, and pretty snug on others which makes quick changes problematic in run and gun situations.
Gary Fong offers a range of light modifiers appropriate to event type photography that afford wide latitude in dealing with rapidly varying environments such as weddings or rope-lines.