Shutter device for a camera
AssigneeCanon Kabushiki Kaisha
InventorsKoichi Washisu, Shinichi Matsuyama, Yasuhiko Shiomi
Life of this patent
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Abstract
An exposure control device for a camera includes a first opening state determination device for digitally determining an aperture opening state, and a second opening state determination device for determining with an analog device the aperture opening state. A control means controls the aperture opening state in accordance with information from at least one of the first opening state determination device and the second opening state determination device.
Claims46
An exposure control device comprising:
- first opening state determination means for digitally determining an aperture opening state;
- second opening state determination means for determining by analog means the aperture opening state;
- and
- control means for controlling the aperture opening state in accordance with information from at least one of said first opening state determination means and said second opening state determination means.
An exposure control device comprising:
- first opening state determination means for determining an aperture opening varying amount;
- second opening state determination means for determining an aperture opening position;
- and
- control means for controlling an aperture opening state in accordance with information of at least one of said first opening state determination means and said second opening state determination means.
An exposure control device comprising:
- first opening state determination means for coarsely determining an aperture opening state;
- second opening state determination means for finely determining the aperture opening state;
- and
- control means for controlling the aperture opening state in accordance with information from at least one of said first opening state determination means and said second opening state determination means.
A camera having an exposure control device, comprising:
- photometry means for detecting a luminance of an object;
- first opening state determination means for determining an aperture opening varying amount;
- second opening state determination means for determining an aperture opening position;
- and
- control means for controlling an aperture opening state in accordance with information from said photometry means, said control means using information from at least one of said first opening state determination means and said second opening state determination means to control the aperture opening state.
A camera comprising:
- first opening state determination means for digitally determining an aperture opening state;
- second opening state determination means for determining by analog means the aperture opening state;
- and
- control means for controlling the aperture opening state in accordance with information from at least one of said first opening state determination means and said second opening state determination means.
A camera comprising:
- photometry means for detecting a luminance of an object;
- first opening state determination means for coarsely determining an aperture opening state;
- second opening state determination means for finely determining the aperture opening state;
- and
- control means for controlling the aperture opening state in accordance with information of said photometry means, said control means using information from at least one of said first opening state determination means and said second opening state determination means.
A camera according to any one of claims 20 or 39 or 22, wherein said photometry means includes means for detecting light passed through an aperture to be controlled.
A camera comprising:
- first opening state determination means for determining an aperture opening varying amount;
- second opening state determination means for determining an aperture opening position;
- and
- control means for controlling an aperture opening state in accordance with information of at least one of said first opening state determination means and said second opening state determination means.
A camera comprising:
- first opening state determination means for coarsely determining an aperture opening state;
- second opening state determination means for finely determining the aperture opening state;
- and
- control means for controlling the aperture opening state in accordance with information from at least one of said first opening state determination means and said second opening state determination means.
A camera comprising:
- photometry means for detecting a luminance of an object;
- first opening state determination means for digitally determining an aperture opening state;
- second opening state determination means for determining by analog means the aperture opening state;
- and
- control means for controlling the aperture opening state in accordance with information of said photometry means, said control means using information from at least one of said first opening state determination means and said second opening state determination means.
Dependencies are inferred from the claim text.