| 摘要 |
PROBLEM TO BE SOLVED: To provide an attachment optical system such that occurence of crosstalk of right and left images with respect to a wide viewing angle is prevented, and an existing two-dimensional image photographing camera is easily made into a three-dimensional image photographing camera.SOLUTION: An attachment optical system includes: a first lens group; a second lens group; a pupil division member provided between the first lens group and the second lens group. The second lens group collects light from the first lens group to form an image, the pipil division member is provided at a back side focal position of the first lens group, a first optical axis and a second optical axis are defined by the pupil division member, both of the first optical axis and the second optical axis are bent, and the first optical axis in the back and front of bending and the second optical axis in the back and front of bending are opposed to each other while interposing an optical axis of the first lens group. |
