JP2004109431A5 - - Google Patents

Description

[0015]
[Means for Solving the Problems and Their Functions and Effects]
According to the first aspect of the present invention, in order to solve the above technical problems, the light emitting portion is pre-lighted a plurality of times by making the light emission amount different before main light emission, and reflected light by the pre-light emission at each light emission amount According to another aspect of the present invention, there is provided a method for controlling flash photography of a camera, comprising selecting one signal optimum for photography from the signal from the AF sensor corresponding to and determining the main light emission amount.

  The flash photography control method of the above camera is directed to an AF sensor which receives a reflected light transmitted through a shooting lens and outputs a signal, an AF control means which performs focus adjustment based on a detection signal from the AF sensor, and a subject. And a light emitting unit that emits light. The camera may include a camera body, and the light emitting unit may be a flash device incorporated in the camera body, or an external flash device attachable to the camera body.

  The camera used in the flash photography control method is a camera having a so-called TTL auto focus function. The AF sensor of the camera is commonly used for the autofocus function and the control for determining the main light emission amount.

  The flash photography control method includes an AF sensor that receives a reflected light transmitted through a shooting lens and outputs a signal, an AF control unit that performs focus adjustment based on a detection signal from the AF sensor, and light directed to an object. And a light emitting unit for emitting light, and the light emitting unit is pre-lighted prior to the main light emission, and a main light emission amount based on a signal including integration time information from the multipoint AF sensor corresponding to reflected light by the pre-light emission. Is used to determine the camera. The camera may include a camera body, and the light emitting unit may be a flash device incorporated in the camera body, or an external flash device attachable to the camera body.

[0030]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a camera using the flash photography control method according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 and FIG. 2 show the configuration of a camera using the above-mentioned flash photography control method. FIG. 1 is a block diagram of a camera in the case of using an external flash device without using a flash device built in the camera body, and FIG. 2 is a configuration in the case of using a flash device built in the camera body FIG.

Claims (7)

An AF sensor that receives a reflected light that has passed through the imaging lens and outputs a signal; an AF control unit that performs focus adjustment based on a detection signal from the AF sensor; and a light emitting unit that emits light toward a subject A flash photography control method for use in the camera comprising
Prior to the main light emission, the light emission amount is varied to perform preliminary light emission a plurality of times, and the signal from the AF sensor corresponding to the reflected light by the preliminary light emission at each light emission amount is one signal optimum for photographing A method of controlling flash photography of a camera, comprising:   The second and subsequent preliminary light emissions among the plurality of preliminary light emissions are effective in that the signal corresponding to the reflected light in the first preliminary light emission quantity can determine the light emission quantity of the light emitting portion at the time of main light emission The method according to claim 1, wherein the method is performed when the value does not have a value.   The light emission amount in the second and subsequent pre-emissions among the plurality of pre-emissions is changed according to whether the signal is in an overflow state or in a non-reflection state. The flash photography control method of the camera as described in 1 or 2. An AF sensor that receives a reflected light that has passed through the imaging lens and outputs a signal; an AF control unit that performs focus adjustment based on a detection signal from the AF sensor; and a light emitting unit that emits light toward a subject The camera is used for a camera that performs preliminary light emission of the light emitting unit prior to main light emission, and determines a main light emission amount based on a signal including integration time information from the multipoint AF sensor corresponding to reflected light by the preliminary light emission. A flash photography control method,
When the signal is in an overflow state, the amount of light emitted from the light emitting unit at the time of main light emission is determined based on the estimated accumulated charge value calculated based on the integration time information. Shooting control method. The method according to any one of claims 1 to 4, wherein the camera includes a camera body, and the light emitting unit is an external flash device attachable to the camera body. The method for controlling flash photography of a camera according to any one of claims 1 to 4, wherein the camera includes a camera body, and the light emitting unit is a flash device built in the camera body. The method for controlling flash photography of a camera according to claim 5, wherein the camera includes a shooting lens.