Patent ID: 8629933
Filing Date: 2014-01-14
Classification: G02B,G03B,H04N

Abstract:
1. A camera system comprising an interchangeable lens and a camera body, the interchangeable lens comprising: the camera body comprising: wherein in an autofocus control, the signal generating unit generates the control signal for controlling the driving unit to drive the focus lens at a first speed until a predetermined time elapses after the first detecting unit starts to detect the contrast value of the image and to drive the focus lens at a second speed higher than the first speed only when the first detecting unit does not detect a peak of the contrast value before the predetermined time elapses after the first detecting unit starts to detect the contrast value of the image, and further comprising a second detecting unit configured to detect that a position of the focus lens is a predetermined distance from an in-focus position when a rate of increase of the contrast value is within a predetermined range before the position of the focus lens runs past the in-focus position, wherein the signal generating unit generates a control signal for controlling the driving unit to drive the focus lens at a third speed lower than the second speed after the second detecting unit detects that the position of the focus lens is at the predetermined distance from the in-focus position.