The 7' Parabolic Umbrella Diffuser from Impact is a translucent light modifier that fits over the Parabolic Umbrella and converts it to a large softbox with just a 1/2 stop loss of output. The resulting soft, flattering quality of light is well-suited to portraiture, group shots or any subject that requires open shadows and low contrast. The diffuser is designed to fit the Impact 7' silver, white and translucent versions of the umbrella (Impact UP-7S, UP-7WB, UP-7T). It can also be used with most other brand 7' parabolic umbrellas (e.g. Westcott, Photoflex, etc.).