Camera and control method therefor
AssigneeCanon Kabushiki Kaisha
InventorMasami Shimizu
Life of this patent
Estimating the term…
Abstract
In a circumstance in which light is emitted from many electronic flashes, e.g., a press conference hall or a wedding hall, light emission from other electronic flashes overlaps preliminary light emission performed before main light emission. This decreases the photometry accuracy with respect to preliminary light emission and makes it difficult to perform proper flash exposure. In a camera system designed to perform preliminary light emission before main light emission, photometry is performed a plurality of number of times upon preliminary light emission, and flash exposure is performed by suppressing photometric values which may have been influenced by light emission as disturbance other than the preliminary light emission.
Claims19
A camera comprising:
- a photometry unit which photometers reflect light from an object upon preliminary light emission a plurality of number of times;
- a suppression unit which suppresses a photometric value, of a plurality of photometric values obtained by said photometry unit, which may have been influenced by light emission as disturbance other than the preliminary light emission;
- and
- a determination unit which determines an amount of light for main light emission by using the photometric values.
A method for controlling a camera, the method comprising the steps of:
- photometering reflect light from an object upon preliminary light emission a plurality of number of times;
- suppressing a photometric value, of a plurality of photometric values obtained from reflect light from the object by the preliminary light emission, which may have been influenced by light emission as disturbance other than the preliminary light emission;
- and
- determining an amount of light for main light emission by using the photometric values.
Dependencies are inferred from the claim text.