| 摘要 |
PURPOSE:To easily and accurately make color corrections of different sensitive materials which vary in spectral characteristics by incorporating movable color balance filters for color corrections in a lens and providing a color temperature conversion filter separately from the movable balance filters. CONSTITUTION:The 1st color balance filter plate 61, the 2nd color balance filter plate 62, a stop 63, and the lens 64 are arranged in a lens system 6. Further, the 1st color temperature conversion filter 66A and the 2nd color temperature conversion filter 66B are incorporated in a color temperature conversion filter frame 66 together with a colorless transparent part 66T, and arranged slidably by a stepping motor 68 perpendicular to the optical axis C of the lens. Then whether a color temperature filter is usable or not and its kind are selected and rough color corrections are completed so that spectral sensitivity characteristics of a sensitive material in use are approximated; and then the 1st and the 2nd color balance filter plates 61 and 62 are selected and combined, and the fine adjustments of color corrections are made. Further, the quantity of light quantity at the time of filter use is corrected by the stop 63. Then, a light source 2 begins to make an exposure scan.
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