Lanthus was using a single Nikon SB-600 with an umbrella to light the Santa shots he was taking at the mall this past Christmas.
In the first shot he was shooting "bare bulb" and you can see a distinctive hotspot in the middle of the umbrella.
He then flipped down the built in diffuser of the SB-600 which automatically sets the flash to a 14mm wide distribution of the light (zooms out).
As you can see in this next shot there is a much more even distribution of light across the entire surface of the umbrella.
Obviously if you are shooting with a flash that does not have a built in diffuser you can (most likely) manually set your flash to zoom out to a 14mm wide light pattern (or as wide as you flash will allow). If you are not familiar with using the "zoom" feature of your flash check your manual for operating details.A BIG thanks to Lanthus Clark for letting me share this information (and his photos) with you and be sure to check out his site, The Photophile, you'll find some good stuff there (including the ever popular topic of DIY).
