Patent ID: 9116299
Filing Date: 2015-08-25
Classification: G02B,G03B,H04N

Abstract:
1. A lens apparatus comprising: a zoom unit that changes a focal length; a zoom position detector that detects a zoom position, the zoom position being the position of the zoom unit; a focus unit that changes an in-focus distance; a focus position detector that detects a focus position, the focus position being the position of the focus unit; a focus driver that drives the focus unit; a focus operation unit configured to direct an in-focus distance; a memory unit in which a relationship between the zoom position and a position of the focus unit associated with the in-focus distance is stored; a focus controller that controls the focus driver, wherein the focus controller performs the following operations respectively: a first operation of deriving a plurality of provisional focus target positions based on a zoom position detected by the zoom position detector, an in-focus distance directed by the focus operation unit and the relationship stored in the memory unit; and a second operation of deriving a focus target position by interpolation calculation based on the plurality of provisional focus target positions that are derived, wherein a frequency of the first operation is less than a frequency of the second operation.