| 摘要 |
An image pickup apparatus for electronically photographing a still image using a photo-voltaic transducer device. The focusing position of a focusing lens is detected from the contrast of the photographed image as AF supplementary light is illuminated on the object. The focusing lens then is moved to its focusing position and the contrast of the photographed image, in both the state where the AF supplementary light is illuminated and the contrast in the state where the AF supplementary light is not illuminated, is calculated. The contrast ratio between the contrast values of the two states is estimated and the focusing position is corrected based on this ratio.
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