When an observation state by an infrared LED 10 is changed to a photographing state by a xenon lamp 3, a movable mirror 16 is pulled upward and an optical path is switched to an image sensor 17 side. A light guide 22a is shifted by an alignment index drive motor 23 so that an incident portion of an alignment index is shifted from a visible LED 22b to direct to an infrared LED 22c. An outgoing portion of the light guide 22a is set at a position where an image is formed on the image sensor 17 by a wavelength of the infrared LED 22c when an operation distance is appropriate. While changing a luminescent color, a position of a luminescent point of the alignment index is changed by switching the LED by the shift of the light guide 22a.
