Photographic camera with interchangeable objectives

Claim 1

IN A PHOTOGRAPHIC CAMERA INCLUDING A CASING AND OBJECTIVES CONSTRUCTED FOR INTERCHANGEABLE COUPLING TO THE CASING AND HAVING DIFFERENT MAXIMUM RELATIVE APERTURES, EACH OBJECTIVE HAVING INCORPORATED THEREIN A DIAPHRAGM AND A DIAPHRAGM APERTURE ADJUSTING MEANS HAVING AN OPERATING COMPONENT INTERENGAGEABLE WITH A DIAPHRAGM SETTING COMPONENT FORMING PART OF DIAPHRAGM SETTING MEANS INCORPORATED IN THE CASING, UPON COUPLING OF THE OBJECTIVE TO THE CASING, AND THE OPERATING COMPONENTS OF THE RESPECTIVE OBJECTIVES OCCUPYING IDENTICAL MAXIMUM DIAPHRAGM APERTURE POSITIONS UPON COUPLING OF THE RESPECTIVE OBJECTIVES TO THE CASING; THE CASING HAVING AN EXPOSURE METER INCORPORATED THEREIN AND INCLUDING AN ELEMENT MOVABLE THROUGH A PRE-SET RANGE IN ACCORDANCE WITH INCIDENT LIGHT VALUES, THE DIAPHRAGM SETTING MEANS INCLUDING A SCANNING ELEMENT MOVABLE FROM AN INITIAL POSITION TO SCAN THE INDICATING POSITION OF THE MOVABLE EXPOSURE METER ELEMENT AND COUPLED TO THE DIAPHRAGM SETTING COMPONENT TO ADJUST THE DIAPHRAGM IN ACCORDANCE WITH THE POSITION OF SAID SCANNING ELEMENT; THE IMPROVEMENT COMPRISING MEANS INDICATING THE MAXIMUM DIAPHRAGM APERTURE OF AN OBJECTIVE DISENGAGEABLY COUPLED TO SAID CASING; AND A DEVICE COOPERABLE WITH SAID APERTURE INDICATING MEANS AND OPERATIVELY ASSOCIATED WITH SAID EXPOSURE METER ELEMENT AND SAID SCANNING ELEMENT AND COOPERABLE BODILY TO ADJUST ONE OF SAID ELEMENTS TO SHIFT SAID RANGE RELATIVE TO INITIAL POSITIONS OF SAID ELEMENTS IN ACCORDANCE WITH THE MAXIMUM RELATIVE APERTURE OF A RESPECTIVE OBJECTIVE COUPLED TO SAID CASING.