Filter compensation for automatic exposure control systems

Claim 1

IN A CAMERA HAVING A PICTURE-TAKING AXIS AND AN AUTOMATIC SYSTEM FOR CONTROLLING EXPOSURE OF FILM THEREIN AS A FUNCTION OF THE OUTPUT OF A PHOTO-RESPONSIVE DEVICE POSITIONED TO BE EXPOSED TO SCENE LIGHT, SAID SYSTEM INCLUDING AN ADJUSTABLE MEMBER MOVABLE TO PREDETERMINED POSITIONS FOR ALTERING THE LIGHT INTENSITY-EXPOSURE VALUE RESPONSE OF SAID SYSTEM BY VARYING THE OUTPUT OF SAID PHOTORESPONSIVE DEVICE, THE IMPROVEMENT COMPRISING: CONTROL MEANS MANUALLY POSITIONABLE IN ACCORDANCE WITH BOTH (A) THE SPEED AND TYPE OF FILM IN SAID CAMERA AND (B) THE LIGHTING CONDITIONS UNDER WHICH SAID FILM IS TO BE EXPOSED; A FILTER CONTROL MEANS FOR MOVING SAID FILTER FROM A FIRST POSITION OUT OF ALIGNMENT WITH SAID PICTURETAKING AXIS TO A SECOND POSITION IN ALIGNMENT WITH SAID AXIS FOR ALTERING THE COLOR BALANCE AND REDUCING THE INTENSITY OF FILM-EXPOSING LIGHT PASSING ALONG SAID AXIS; AND MEANS INTERCONNECTING SAID FILTER CONTROL MEANS AND SAID ADJUSTABLE MEMBER WITH SAID CONTROL MEANS, THE POSITIONING OF SAID CONTROL MEANS FOR PRESELECTED COMBINATIONS OF FILM SPEED AND TYPE AND LIGHTING CONDITIONS SELECTIVELY MOVING SAID FILTER TO SAID SECOND POSITION AND MOVING SAID ADJUSTABLE MEMBER TO ALTER THE RESPONSE OF SAID AUTOMATIC SYSTEM IN ACCORDANCE WITH THE SPEED AND TYPE OF FILM BEING EXPOSED THEREIN AND IN ACCORDANCE WITH SAID REDUCTION OF INTENSITY OF FILM-EXPOSING LIGHT OCCURRING WHEN SAID FILTER IS MOVED TO SAID SECOND POSITION.