| 摘要 |
Aperture-priority, shutter-priority, and programmed automatic exposure modes may be selected, with or without automatic focus control. For certain types of operation, the diaphragm value of a photographic lens is set to a value between maximum and minimum diaphragm values in response to measurement of the luminance value of an object, and when the set diaphragm value is smaller than a predetermined diaphragm value at which the lens has a predetermined depth of focus, the diaphragm is adjusted to the predetermined diaphragm value, and the shutter time (speed) is adjusted accordingly to provide a proper exposure.
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