| 摘要 |
This specification discloses an image taking lens system which can quickly effect focusing from an infinity object to a short-distance object. The image taking lens system disclosed in the present specification has, in succession from an object side to an image side, a first lens unit, a second lens unit, a third lens unit and a fourth lens unit. In case of focusing from the infinity object to the short-distance object, the first lens unit is not moved, but the second lens unit is moved to the image side and the third lens unit is moved to the object side. The principal point interval between the first lens unit and the second lens unit is a negative value.
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