1. Field of the Invention
This invention relates to an exposure adjusting device for a camera which enables first priority photographic information to be automatically adjusted.
2. Description of the Prior Art
Conventionally, in automatic exposure control apparatus for cameras, there is a shutter priority method and a diaphragm priority method for automatically setting a proper film exposure. Usually a desired shutter time or diaphragm value first is set by operating a shutter dial or diaphragm setting ring. Subsequently, a light measuring switch is turned on in order to perform a light measuring computation so that the operator will know the diaphragm value of shutter time as a function of the computed exposure value which corresponds to the object brightness. A release operation then may be performed establishing an exposure control that is based on the computed exposure value. With the light measuring switch turned on, when the first shutter time setting or diaphragm value setting is wrong with respect to the object brightness, in other words, when the computed exposure value is out of an exposure response range, or when the computed exposure value is outside of what was intended by the photographer, it is necessary to re-adjust the shutter time or diaphragm value. Therefore, the shutter dial or diaphragm setting ring is operated again in order to change the exposure value to a value that is desired or that is within the response range of the computed exposure value. After that, the release operation may be performed.
Such conventional setting and resetting of the shutter dial or the diaphragm setting ring is not only troublesome but also is time-consuming. Consequently, good shutter opportunities are missed and picture framing determination in the exposure operation is hindered. The setting and resetting operations of the shutter dial or diaphragm setting ring are particularly troublesome in motor driven photography, in which a motor drive unit is attached to a camera and in which the shutter button is located on the grip. In remote control photography, the resetting operation is particularly troublesome. Some photographic situations may be encountered, for example, in which the shutter dial or diaphragm ring simply canot be reset.
It is an object of the present invention to eliminate these drawbacks.
Another object of the present invention is to make it possible to reset photographic information.
Still another object of the present invention is to make it possible to set and reset photographic information easily, even in motor drive photography and in remote control photography.
A further object of the present invention is to make it possible to change the set shutter time to a flash exposure time when flash photography is rendered operative.