PURPOSE: To improve irradiation efficiency and to reduce the size of the device by providing an irradiation angle setting means which moves a Fresnel lens forward while moving a light source and a reflecting umbrella in such a direction that the distance in the optical axis direction is shortened.

CONSTITUTION: A light source 12 consisting of a straight type flash light tube is provided. The solid-line position of the Fresnel indicates a position of wide- angle photography and the two-dot chain line position 11a indicates a position of telephotography; and the solid-line position of the light source indicates a position of wide-angle photography and the two-dot chain line position 12a indicates a position of telephotography respectively. Thus, the light source 12 and Fresnel lens 11, or reflecting umbrella 13 and Fresnel lens 11 are moved at the same time to vary the irradiation angle. Consequently, the irradiation efficiency is improved and the size reduction or the view angle of a high-power zoom lens is realized.