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US 4,309,090 AGranted
Exposure indicating device
AssigneeMinolta Camera Kabushiki Kaisha
InventorSeiji Yamada
Life of this patent
Estimating the term…
Abstract
An exposure indicating device indicates at the same time a result of average light measurement which measures a light level of a substantial portion of a scene to be photographed, and a result of spot light measurement which measures a brightness at a small portion of the scene. One of the values of the average and spot light measurements is displayed numerically to indicate its absolute value, while the other is displayed as a deviation from the former value.
Claims17
An exposure indicating device for a photographic camera comprising:
- a first light detecting means for detecting the light level of a substantial portion of a scene to be photographed and generating a first output;
- a second light detecting means for detecting the brightness at a small portion of the scene and generating a second output;
- a first indicator means selectably connectable to said first and second light detecting means for indicating said first or second output, said indication being in the form of a numerical representation;
- switching means for selectively connecting said first indicator means to said first and second light detecting means;
- means for detecting the amount of the difference between said first and second outputs;
- and
- a second indicator means for indicating the amount of the difference.
4 more elements
An exposure indication and control system for a photographic camera comprising:
- a first light detecting means for detecting the light level of a substantial portion of a scene to be photographed and generating a first output;
- a second light detecting means for detecting the brightness at a small portion of said scene and generating a second output;
- an exposure control means for controlling camera exposure in response to one of the values detected by said first and second light detecting means;
- switching means for selectively connecting said exposure control means to said first or second light detecting means;
- a first indicator means for indicating the exposure value to be controlled by said exposure control means, said first indicator means including means for presenting the indication in the form of a numerical representation;
- means for detecting the amount of the difference between said first and second outputs;
- and
- a second indicator means for indicating the amount of said difference.
5 more elements
Dependencies are inferred from the claim text.