Photographic camera having an interchangeable lens

A camera having an aperture, comprising:

• a viewfinder having means to display depth-of-field data;
• a lens having means for storing lens data;
• an automatic focusing device for calculating a depth-of-field range or receiving data on a predetermined depth-of-field range of an imaged object, the automatic focusing device being operatively connected to the lens so as to receive lens data and to the viewfinder so as to provide depth-of-field data to the viewfinder;
• an automatic program exposure control device operatively connected to the automatic focusing device;
• means for successively automatically positioning the lens to the front and rear depth-of-field planes which define the depth-of-field range comprising a drive motor for displacing the lens, the means for successively automatically positioning the lens being operatively connected to the automatic focusing device so as to successively displace the lens to the front and rear depth-of-field planes, whereby the means for displaying data on the depth-of-field range in the viewfinder displays data on each respective depth-of-field plane at each successive position of the lens;
• means operable in the event that a predetermined depth-of-field range is provided to the automatic focusing device for displaying a minimum theoretical aperture number in the viewfinder for the predetermined depth-of-field range;
• and
• means operatively connected to the automatic program exposure control device for setting the aperture to the minimum theoretical aperture number.