The diffuser is used to create exposures of even density over the entire surface of film. Use the diffuser by placing it flush against the front of the lens and exposing through it. The light that passes through the diffuser and on to the film will create an even density across the surface of the film. Flash straight on if without our diffuser causes the light to go forward only and creates a harsh shadow behind the subject. The flash with our diffuser installed and tilted at 45 degrees gives a nice soft wrap around of light with a soft shadow behind the subject. This fits cleanly over the head of your existing flash, no need Compatible withcumbersome attachments, hooks. It disperses the light over a wider area Compatible witha softer, more balanced and natural effect than you didn't use before. It helps to reduce hard background shadows and eliminates the annoying red eye effect. Specification: Material:ABS Plastic Size Chart: Size:Approx. 70x60x50mm/2.8x2.4x1.97inch Package Includes: 2 Pieces Flash Diffuser Note: All dimensions are measured by hand, there may be small deviations. Color may vary slightly due to the color setting of each individual monitor. Thanks Compatible withyour understanding. Please enjoy your happy shopping time!