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US 6,714,734 B2Granted
Camera
AssigneeNikon Corporation
InventorMasaru Muramatsu
Life of this patent
Estimating the term…
Abstract
A camera comprises a storage-type photometering sensor that detects some of light from a subject; a control device that controls an auxiliary illumination device so as to perform a preliminary light emission through a single-shot light emission and controls the storage-type photometering sensor so as to detect the subject light stored over a storage period matching a length of time over which light is emitted during the preliminary light emission; and a setting device that sets a light emission condition under which the auxiliary illumination device is to emit light during a flash photographing operation based upon detection results obtained at the storage-type photometering sensor.
Claims8
A camera comprising:
- a storage-type photometering sensor that detects some of light from a subject;
- a control device that controls an auxiliary illumination device so as to perform a preliminary light emission through a single-shot light emission and controls the storage-type photometering sensor so as to detect the subject light stored over a storage period matching a length of time over which light is emitted during the preliminary light emission;
- a setting device that sets a light emission condition under which the auxiliary illumination device is to emit light during a flash photographing operation based upon detection results obtained at the storage-type photometering sensor;
- and
- a decision-making device that makes a decision whether a detection value obtained at the storage-type photometering sensor through the preliminary light emission is equal to or smaller than a predetermined value, wherein:
- if the detection value is determined to be equal to or smaller than the predetermined value by the decision-making device,
- (a) the control device controls the auxiliary illumination device so as to execute an additional preliminary light emission with a greater flash output than in the preliminary light emission and controls the storage-type photometering sensor so as to detect subject light stored over a storage time matching a length of time over which light is emitted during the additional preliminary light emission and
- (b) the setting device sets the light emission condition under which the auxiliary illumination device is to emit light for the flash photographing operation based upon detection results obtained at the storage-type photometering sensor during the addition preliminary light emission.
5 more elements
A camera comprising:
- a storage-type photometering sensor that detects some of light from a subject;
- an auxiliary illumination device that illuminates the subject;
- a control device that controls the auxiliary illumination device so as to perform a preliminary light emission through a single-shot light emission and controls the storage-type photometering sensor so as to detect the subject light stored over a storage period set equal to or matching a length of time over which light is emitted during the preliminary light emission;
- a setting device that sets a light emission condition under which the auxiliary illumination device is to emit light during a flash photographing operation based upon detection results obtained at the storage-type photometering sensor;
- and
- a decision-making device that makes a decision whether a detection value obtained at the storage-type photometering sensor through the preliminary light emission is equal to or smaller than a predetermined value, wherein:
- if the detection value is determined to be equal to or smaller than the predetermined value by the decision-making device,
- (a) the control device controls the auxiliary illumination device so as to execute an additional preliminary light emission with a greater flash output than in the preliminary light emission and controls the storage-type photometering sensor so as to detect the subject light stored over a storage time matching a length of time over which light is emitted during the additional preliminary light emission and
- (b) the setting device sets the light emission condition under which the auxiliary illumination device is to emit light for the flash photographing operation based upon detection results obtained at the storage-type photometering sensor during the additional preliminary light emission.
6 more elements
Dependencies are inferred from the claim text.