The Strobies Large On-Camera Silver/White Reflector fastens easily to almost any standard or zoom lens, up to 90mm in diameter.
Face the white side of the reflector towards your subject and add a slight, soft fill from the ambient light. Its presence is most noted when used while shooting close-ups. If your subject matter is highly reflective (metal, jewelry), the white reflection appears as merely a catch light without showing your camera.
The silver side is used to add a dramatic fill and sharp contrast. The use of a lens hood is recommended to stop flare entering the lens.