| 摘要 |
PROBLEM TO BE SOLVED: To obtain a photographing device which suitably produces a photographic effect by an optical filter and can reduce the size of a photographic optical system including the optical filter.SOLUTION: In a photographing device 100, the diameter 12R of an optical filter 12 is smaller than the diameter 13Rmax of an effective luminous flux in the maximum aperture diameter of a variable aperture diaphragm 13, and an opening and closing drive control part 50 performs the opening and closing drive control of the variable aperture diaphragm 13 within a range where the diameter of the effective luminous flux prescribed by the aperture diameter of the variable aperture diaphragm 13 does not exceed the diameter 12R of the optical filter 12, when the optical filter 12 is inserted into an optical path of a photographic optical system 10. |
