JP2008046226A5 - - Google Patents

Claims (6)

In an automatic focus adjustment apparatus that performs focus adjustment based on a focus signal corresponding to a contrast of an image extracted from an output signal of an imaging means,
Setting means for setting an autofocus area in the screen of the imaging means;
A plurality of bandpass filters having different frequency characteristics for extracting a focus signal from the output signal of the imaging means corresponding to the autofocus region;
An automatic focus adjustment apparatus comprising: a selection unit that selects a band-pass filter having a frequency characteristic according to the state of the set autofocus region.   2. The automatic focusing apparatus according to claim 1, wherein the state of the set autofocus area is a position or a size on the screen of the imaging unit. The selection means does not select a bandpass filter having a frequency characteristic for extracting a high-frequency component in an autofocus region where there is a high possibility that another subject other than the main subject exists, and has a frequency characteristic for extracting a low-frequency component. 3. The automatic focusing apparatus according to claim 1 , wherein a band pass filter is selected . Depending on the choice of the one of the two kinds of different recording formats, automatic according to any one of claims 1 to 3, characterized in that said allowing the operation of the selection means or prohibiting Focus adjustment device. The storage format, the automatic focusing device according to any one of claims 1 to 4, characterized in that a format defining the resolution. An image pickup apparatus comprising the automatic focus adjustment apparatus according to claim 1 .