JP2009145645A5 - - Google Patents

Claims (5)

Focus detection means for detecting a focus state of an imaging optical system including a focus lens;
Control means for controlling the driving of the focus lens based on a detection result by the focus detection means,
The control means drives the focus lens in a first area and a second area where the movement amount of the focus lens is different from the amount of change in the focus state of the imaging optical system in the movable range of the focus lens. Optical equipment characterized by varying speed. Compared to the first region, the amount of movement of the focus lens relative to the amount of change in the focus state of the imaging optical system in the second region is large.
2. The optical apparatus according to claim 1 , wherein the control unit makes the driving speed of the focus lens in the second area faster than the driving speed in the first area. A speed setting means for variably setting a reference driving speed of the focus lens;
The optical apparatus according to claim 1, wherein the control unit changes a driving speed of the focus lens in the first and second regions with respect to the reference driving speed. The control means calculates a focus position of the focus lens based on a detection result by the focus detection means,
The control means drives the focus lens in the first area and the second area when driving the focus lens in a predetermined range narrower than a movable range of the focus lens including the in-focus position. The optical apparatus according to any one of claims 1 to 3, wherein the speed is varied. The optical apparatus according to any one of claims 1 to 4, comprising the imaging optical system;
An imaging system comprising: an imaging device detachably attached to the optical device.