Precision Design PD-FD580 Bounce Flash Diffuser for Canon Speedlite 580EX & 580EX II for $3.95 + free shipping
The Precision Design PD-FD580 Bounce Flash Diffuser creates a diffused bare bulb effect, and is designed specifically to fit the Canon 580EX / 580EX II Flash Units. It gives even coverage across the entire frame, and works flawlessly with lenses from 15mm to 200mm in the 35mm format (as well as other formats).
The PD-FD580 is easy to use and attaches to your flash in seconds with a snug, custom fit, and not a single piece of velcro or other adhesive. Designed for years of service with out the bulk of some other diffusers, it is small enough to fit easily into your gadget bag or pocket, yet it makes a huge difference in all your photos.