Drive controller of a lens apparatus
AssigneeCanon Kabushiki Kaisha
InventorYusuke Kusaka
Life of this patent
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Abstract
A drive controller of a lens apparatus including a first lens unit moving for performing manual focus and a second lens unit moving for performing auto-focus has a control device switchable between a first mode for performing an auto-focus control of the second lens unit and a second mode for making the second lens unit unmovable at a predetermined position. The control device has a third mode for controlling drive of the second lens unit, upon receiving a command for switching from the first mode to the second mode, so as to maintain a focus state of the lens apparatus, on the basis of positional information of the first lens unit. The controller moves to the second mode upon detecting that the second lens unit has reached the predetermined position in the third mode.
Claims34
A drive controller of a lens apparatus including a first lens unit moving for performing manual focus and a second lens unit moving for performing auto-focus, comprising:
- a control device switchable between a first mode performing an auto-focus drive control of the second lens unit and a second mode maintaining the second lens unit in an unmovable state at a predetermined position,
- wherein the control device has a third mode controlling drive of the second lens unit so as to maintain a focus state of the lens apparatus upon receiving a command for switching the first mode to the second mode, on the basis of positional information of the first lens unit, and moves to the second mode upon detecting that the second lens unit has reached the predetermined position in the third mode.
A drive controller of a lens apparatus including a first lens unit moving for performing manual focus and a second lens unit moving for performing auto-focus, comprising:
- a control device switchable between a first mode performing an auto-focus drive control of the second lens unit and a second mode maintaining the second lens unit in an unmovable state at a predetermined position,
- wherein the control device has a third mode performing the focus drive control until detecting that the second lens unit has reached the predetermined position, and in the third mode, upon receiving a command for switching the first mode to the second mode, moves to the second mode in response to detecting that the second lens unit has reached the predetermined position.
A lens system comprising:
- a lens apparatus including a first lens unit moving for performing manual focus and a second lens unit moving for performing auto-focus;
- and
- a drive controller comprising a control device switchable between a first mode performing an auto-focus drive control of the second lens unit and a second mode maintaining the second lens unit in an unmovable state at a predetermined position, wherein the control device has a third mode controlling drive of the second lens unit so as to maintain a focus state of the lens apparatus upon receiving a command for switching the first mode to the second mode, on the basis of positional information of the first lens unit, and moves to the second mode upon detecting that the second lens unit has reached the predetermined position in the third mode.
A lens system comprising:
- a lens apparatus including a first lens unit moving for performing manual focus and a second lens unit moving for performing auto-focus;
- and
- a drive controller comprising a control device switchable between a first mode performing an auto-focus drive control of the second lens unit and a second mode maintaining the second lens unit in an unmovable state at a predetermined position, wherein the control device has a third mode performing the focus drive control until detecting that the second lens unit has reached the predetermined position, and in the third mode, upon receiving a command for switching the first mode to the second mode, moves to the second mode in response to detecting that the second lens unit has reached the predetermined position.
A lens apparatus comprising:
- a first lens unit moving for performing manual focus;
- a second lens unit moving for performing auto-focus;
- and
- a drive controller comprising a control device switchable between a first mode performing an auto-focus drive control of the second lens unit and a second mode maintaining the second lens unit in an unmovable state at a predetermined position, wherein the control device had a third mode controlling drive of the second lens unit so as to maintain a focus state of the lens apparatus upon receiving a command for switching the first mode to the second mode, on the basis of positional information of the first lens unit, and moves to the second mode upon detecting that the second lens unit has reached the predetermined position in the third mode.
A lens apparatus comprising:
- a first lens unit moving for performing manual focus;
- a second lens unit moving for performing auto-focus;
- and
- a drive controller comprising a control device switchable between a first mode performing an auto-focus drive control of the second lens unit and a second mode maintaining the second lens unit in an unmovable state at a predetermined position, wherein the control device has a third mode performing the focus drive control until detecting that the second lens unit has reached the predetermined position, and in the third mode, upon receiving a command for switching the first mode to the second mode, moves to the second mode in response to detecting that the second lens unit has reached the predetermined position.
Dependencies are inferred from the claim text.