Patent ID: 8899765

Claim:
A stroboscopic device comprising: a light emitter disposed in a casing, the light emitter including a light source and a reflector for reflecting a light ray from the light source in an irradiation direction; and a light controller disposed in an opening of the casing, the light controller controlling the light ray from the light emitter, and the stroboscopic device adapted for changing an irradiation angle by varying a distance between the light controller and the light source, wherein a plurality of prisms that do not cover an opening of the reflector, the prisms bending the light ray from the light source into an optical axis direction, the prisms move between a first position at the a front of the reflector to a second position at a back of the reflector, the stroboscopic device is switches to a telephoto mode by moving the light source away from the light controller, at least one of the prisms being disposed, at least in the telephoto mode, between a line connecting the light source and an end of the light controller and a line connecting a central axis of the light source and an open end of the reflector, the at least one of the prisms and the light controller controlling the light ray from the light source, and the stroboscopic device is switches to a wide-angle mode by moving the light source close to the light controller, the prisms being moved, at least in the wide-angle mode, to the back of the reflector, only the light controller controlling the light ray from the light source.