The flash gun has at least one rod shaped light source (3) arranged in a reflector (2). A light control device (5) is arranged in front of the reflector. The light emission angle is varied so the relative distance between the reflector with the light source and the light control device is varied, or the position of the light source relative to the reflector. The light control device has a scatter control section (6) which shows the light scattering effect only relative to the longitudinal direction of the light source. The light control device also has a converging control section. This has a convergent effect provided directly from the light source or via the reflector. The light control device scatter control section is a concave cylinder lens on one surface of the light source and the converging section or a Fresnel lens is arranged on the other surface formed as a ring zone lens.
