Patent ID: 7330212
Filing Date: 2008-02-12
Classification: G02B,H04N

Abstract:
1. A drive controller of a lens apparatus including a first lens unit movable to perform manual focus and a second lens unit disposed closer to an image than the first lens unit to perform auto focus, comprising: a detection device detecting a focal state of the lens apparatus; a storage device storing the focal state detected by the detection device; and a control device controlling the detection device detecting the focal state and the storage device storing a detection result of the detection device during manual focus by the first lens unit, performing auto focus by moving the second lens unit based on the detection result of the detection device stored in the storage device during the manual focus after completion of the manual focus, and shifting the focal state that is out of a focal position to the focal position by the manual focus, wherein a maximum drive quantity (L) of the second lens unit in accordance with the focus compensation operation, in a direction towards each of an object and an image, relative to a predetermined position of the second lens unit, a focal depth (D) of the lens apparatus, an F-number (Fno) of the lens apparatus, and a diameter (δ) of a permissible circle of confusion satisfy the following conditions: 0<L<10D, wherein the control device performs a compensation operation on the manual focus by the focus control of the control device after completion of the manual focus.