| 摘要 |
<p>Provided is an interchangeable lens camera system which performs contrast system autofocusing for photographing at an optimum focused position, even when two or more interchangeable lens groups having different lens spherical aberration quantities and a plurality of kinds of camera groups having different autofocus evaluation frequencies are combined in any way. The camera system is provided with a removable lens unit and a removable camera body. The lens unit is provided with a first operating section for acquiring photographing parameters corresponding to focusing operation, and a storage section wherein reference data to be used at the time of correcting the focal point position based on video contrast is stored. The camera body is provided with an imaging element which outputs a video signal corresponding to an object to be photographed; and a second operating section, which measures contrast of a video based on the previously fixed intrinsic AF evaluation frequency during focusing operation, and calculates a correction value, based on the photographing parameters and the reference data when the contrast is at the maximum, and the camera body changes the focal point position, in accordance with the calculated correction value.</p> |
