PURPOSE: To take a close-up photograph of an automatic focusing camera without any problem such as parallax and an error in distance measurement by using one close-up lens having an ND filter locally.

CONSTITUTION: Infrared light emitted by an infrared-light source 17 is passed through a projection lens 18 and the close-up lens 30 to form a spot image on a subject 21. At this time, the infrared-light flux is refracted in an optical-axis direction by being passed through the peripheral part of the close-up lens 30 and crosses the optical axis of a photographic lens 14 at a distance of the focal length of the close-up lens 30 from the close-up lens 30. Consequently, if the subject 21 is at the distance of the focal length of the close-up lens 30 from the close-up lens 30 when the close-up lens 30 is mounted, there is no parallax between a photographic optical system 11 and a distance measuring optical system 13. The reflected light of the spot image of the infrared light on the subject 21 is refracted by being passed through the peripheral part of the close-up lens 30 and attenuated through the ND filter 31 to form an image on an optical position detecting element 20 through a photodetection lens 19.