Abstract: The headlight has a light ray guiding disk which is domed towards the source of light. This light ray guiding disk is structured as integral formed article and includes at its central zone, which has the smallest distance from the source of light, a collective lens structure. By means of this a substantial portion of the light rays emitted from the source of light into a spatial angle in front of the source can be focussed in the direction of the axis of the headlight. The light ray guiding disk can be manufactured as simple formed article. A transparent ring in a signal color is foreseen outside the light ray guiding disk. By means of this disk the stray light is utilized for a lateral marking when the headlight is used e.g. in a bicycle lighting arrangement.

Abstract: An adapter for mounting an instant picture cassette to a 35 mm camera, the back panel of which is removable, comprises an adapter plate which carries a back member corresponding to the back panel of the camera as well as an instant picture cassette. In an opening of the adapter plate a fiber optic face plate is mounted by means of a resilient support of silicone rubber in a position which ascertains its contacting the film guides of the camera which define the camera's focal plane. The resilient support of the face plate allows the same to adjust its position automatically when contacting said guides. The face plate transfers the picture from the image plane of the camera to the surface of the instant picture film so that an instant picture can be taken through the optics of the 35 mm camera which is useful for producing test pictures before taking pictures by means of the normal camera.