| 摘要 |
<p>An endoscopic apparatus comprises an endoscope including an objective optical system comprising a power-changing movable lens and a focusing movable lens so as to form a subject image and an imager that photoelectrically converts the subject image, to have an optical variable-power function that optically changes a magnification of the subject image through the power-changing movable lens and an electronic variable-power function that electronically enlarges the subject image taken by the imager. The focusing movable lens that makes a focal adjustment of the subject image at between: a first focusing point and a second focusing point on a nearest point side. The endoscopic apparatus further comprises an auto-focus circuit that performs, during operation with the electronic variable-power function, an auto-focusing on the subject image through use of the focusing movable lens by taking, as the first focusing point, a position of the power-changing movable lens upon shifting from optical power change to electronic power change.</p> |
