The diffuser is used to create exposures of uniform density across the entire surface of the film. Use the diffuser by placing it flush against the front of the lens and exposing it through. Light passing through the diffuser and onto the film will create a uniform density across the entire surface of the film. Flash straight if without our diffuser it only makes the light go forward and creates a hard shadow behind the subject | The diffuser is used to create exposures of uniform density across the entire surface of the film. Use the diffuser by placing it flush against the front of the lens and exposing it through. Light passing through the diffuser and onto the film will create a uniform density across the entire surface of the film. Flash straight if without our diffuser it only makes the light go forward and creates a hard shadow behind the subject | The flash with our diffuser installed and tilted at 45 degrees offers a nice and soft enveloping of light with a soft shadow behind the subject | This fits snugly over your existing flash head, no need for bulky accessories, hooks. Test us and see the difference | Disperses the light over a larger area for a softer, more balanced and natural effect than what you haven't used before | Helps to reduce harsh background shadows and get rid of the annoying red eye effect