Gary Fongs "Puffer" is one of the smartest diffusers that I have ever seen for a DSLR with a pop-up flash. The "Puffer" slides into the cameras hot shoe, separates itself from the pop-up flash and spreads the light wider than the flash could ever do with out it. Without the puffer, the pop-up flash produces a hard unattractive light, a type of light that I would never use when photographing people. When the "Puffer" is used correctly, it diffuses the light and now gives your subject a softer more appealing light. Thank you Gary for another incredible diffuser!