I've been doing a bit of volunteer photography for a local community magazine and they want me to photograph five different people for five different upcoming articles. I've got access to a Canon 430EX Speedlite but I'd like to pick up a diffuser for it. Not sure what works best. I've seen the Fong diffusers that slip over the speedlite and I've seen the large 8" rectangle diffuser that sort of looks like a mini softbox. For portraits I have no idea what would work best. I'm hoping for an inexpensive solution to soften the harshness of the flash. Any suggestions? Also, I was thinking of shooting with my 17-50mm F2.8 Tamron (probably at around 30-35mm). Would that work? My buddy's got a 50mm F1.8 (which is 80mm on my camera) but I'm thinking the zoom lens would be more flexible. I will likely be photographing both indoors and out (daytime only).