What is the function of a diffuser in a lighting setup?

• A. Increase color saturation
• B. Create hard, defined shadows
• C. Change the camera's exposure metering
• D. Soften shadows and reduce contrast

Answer: (D)

A diffuser changes how light falls on the subject by spreading it over a larger area, making the light source appear bigger. That bigger light source creates softer shadows with gentler edges and lowers overall contrast, which is the hallmark of diffused light. It also helps reduce harsh specular highlights for a more even, flattering illumination. It doesn’t inherently boost color saturation, and it doesn’t produce hard shadows or directly alter the camera’s metering—the diffuser’s job is about quality of light, not color or measurement. In practice, you’d use diffusion to achieve a more forgiving, even look on the subject, often with translucent materials or softboxes placed between the light and the scene.