| 摘要 |
When establishing a program exposure response of a camera, an EV value is calculated from the brightness of an object being photographed, a film speed and the like, and a programmed calculation is made on the basis of a preset program response and the EV value to determine an exposure period and a diaphragm aperture in the absence of a program shift input. However, in the presence of a program shift operation, the relationship between an exposure period and a diaphragm aperture is shifted through a given number of steps, and a new program response is established so that the exposure period and the diaphragm aperture varies according to an EV value from their shifted value, thus determining an exposure control value.
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