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US 7,742,694 B2Granted
Optical apparatus with aperture controller
AssigneeCanon Kabushiki Kaisha
InventorTomoaki Yamanaka
Life of this patent
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Abstract
An optical apparatus, such as an image pickup apparatus, includes a detector configured to detect whether a manual aperture operation unit is operated by an amount greater than or equal to a predetermined amount during automatic aperture control. When an aperture fixing switch is operated or when the detector detects that the manual aperture operation unit is operated by an amount greater than or equal to the predetermined amount, automatic aperture control is disabled and manual aperture control is enabled.
Claims6
An optical apparatus comprising:
- an image pickup element configured to convert a received optical image into an electrical signal;
- an aperture unit configured to restrict a quantity of light incident on the image pickup element;
- a manual aperture operation unit configured to give an instruction indicating that the aperture unit is manually driven by a photographer;
- an aperture control unit configured to automatically control the aperture unit in accordance with the electrical signal output from the image pickup element or to control driving of the aperture unit according to an operation of the manual aperture operation unit;
- and
- an operation-amount detector configured to detect an amount the manual aperture operation unit is operated,
- wherein, in a case where the aperture unit is automatically driven, when the operation-amount detector detects that the manual aperture operation unit is operated by an amount greater than or equal to a predetermined amount, the aperture control unit disables automatic aperture control and enables manual aperture control of the aperture unit.
4 more elements
Dependencies are inferred from the claim text.