| 摘要 |
Disclosed is an auto focus device that automatically and easily sets an AF frame to a focus range desired by a cameraman in an AF system. An auto focus device includes: a focusing unit that performs focusing on an imaging screen of a camera; a best focus range detecting unit that detects a best focus range from the imaging screen showing the focus result of the focusing unit; and an AF frame automatic setting unit that automatically sets the position of an AF frame indicating the range of an AF area, which is a target range focused by auto focus in the imaging screen, in the detected best focus range.
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