A camera system includes a wireless indicator that emits light to provide signals to a user. This wireless indicator is attached to a lens casing that covers the front face of the camera to protect components of the camera such as the lens. A wireless signal interface on the front face of the camera is configured to emit ultraviolet light in response to control circuitry within the camera. The ultraviolet light is transmitted through the lens casing to an excitable element. The excitable element produces visible light in response to the ultraviolet light. Any re-emitted visible light that travels back towards the camera lens and image sensor is reflected by a reflective layer, which is configured to transmit ultraviolet light while reflecting visible light. Therefore, the wireless indicator does not cause light artifacts or image flaws to appear in images captured by the image sensor.