1. The diffuser is used to create exposures of even density over the entire surface of film. 2. Diffusion material effectively spreads light evenly on your subject, preventing harsh shadows. 3. With its elastic band, you can install or uninstall it easily. 4. It is foldable, thus you can fold and unfold it, and bring it with you wherever and whenever you need. 5. Soften light stream and remove shadow to make perfect shooting.