| 摘要 |
A focus detecting device for performing focus detection of passive type using phase-difference detection includes a sensor composed of a plurality of pixels which are paired, and a judgment circuit for judging whether a target image for focus detection is a thin line close to a pixel pitch of the sensor, on the basis of a correlation varying amount of two images formed divisionally on the sensor and an output difference of adjacent pixels of each of the two images, so that it is possible to cope with the thin-line image.
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