A light diffuser for a camera used in macro photography, the diffuser formed from a prism having a body that includes an opening to accommodate the camera lens such that the body is positioned adjacent the camera flash unit for receiving and redirecting light throughout the body to exit a front face thereof around the lens and illuminate the subject in a desirable manner. Ideally the body is a unitary transparent material having facets formed thereon to provide internal reflection. One or more filter elements aid in conditioning the light processed in the diffuser body, such as diffusing, adding color to, and focusing the light.