METHOD FOR FOCUSSING THE SHOOTING LENS OF A MOTION-PICTURE OR VIDEO CAMERA

摘要

The invention relates to a method for focussing the shooting lens (2) of a motion-picture or video camera on an object (T) whose position on a monitor is indicated by an indicating device whereby orienting a distance measuring device toward the object (T). The measured distance of the object (T) from the camera (1) is furnished to a control unit in the form of a set value for automatically focussing the shooting lens (2) and/or is indicated as a measured value for manually focussing the shooting lens (2). In order to eliminate resulting parallax errors from the distance of the distance measuring device from the optical axis of the motion-picture camera, the focus to be set on the shooting lens (2) is determined from a vector (A) pointing from the shooting plane (FE) of the camera to the measuring point (LRF) of the distance measuring device, from a vector (B) pointing from the shooting plane (FE) of the camera to the optical principal point (OHP) of the shooting lens (2), from a vector (C) pointing from the measuring point (LRF) of the distance measuring device to the object (T) to be focussed, and on data of the shooting lens (2).