I just bought a Canon 40D and a Speedlite 420EX flash.
I practiced at home and realized that it's best to bounce flash of ceilings for more "natural lighting".
How about outdoors like at BBQ and no ceilings? It that why people use a bounce card? Is the bounce card supposed to function as a "ceiling"' to reflect light at the subject?
What about diffusers? What are those for? Does it mean that with a diffuser, I can point the flash directly at the object and not get the harsh flash light in the face?