Method of and apparatus for measuring scene brightness
Light measuring device
Exposure control apparatus for camera
Method of and apparatus for automatically controlling exposure
Automatic exposure control apparatus with improved exposure value calculation for photographing a moving object
Exposure control device Patent #: 5272538
ApplicationNo. 933819 filed on 08/24/1992
US Classes:396/234More than two photometering areas
ExaminersPrimary: Perkey, W. B.
Attorney, Agent or Firm
Foreign Patent References
International ClassG03B 007/28
Foreign Application Priority Data1991-08-27 JP
AbstractAn exposure calculating apparatus includes a light-metering device, consisting of a light-metering elements corresponding to elementary areas obtained by dividing a field of a focusing optical system, for measuring a light intensity distribution in the field, a position of object detecting means for detecting a position of object in the field, a classifying means for changing a divisional pattern of light-metering areas in correspondence with the position of object, and classifying the light-metering elements of the light-metering device into a plurality of groups according to the divisional pattern, and a calculating device for calculating an exposure value by weighting the outputs from the plurality of light-metering elements in correspondence with the groups to which the light-metering elements belong, and supplying the exposure value to exposure control.