a method including : obtaining a sequence of pictures from a camera associated with a video conferencing endpoint ; determining a presence of a target point coinciding with an optical source within a field of view of the camera , wherein the optical source emits pulses of electromagnetic radiation at a rate that causes the camera to capture some frames with a pulse of electromagnetic radiation from the optical source and some frames without the pulse of electromagnetic radiation from the optical source ; determining a location of the target point within one or more of the pictures by comparing a first frame from the camera that includes the pulse of electromagnetic radiation from the optical source and a second frame from the camera that does not include the pulse of electromagnetic radiation from the optical source ; moving the camera so that a center of one or more subsequent pictures obtained by the camera coincides with the target point ; and zooming the camera until receipt of an instruction to stop zooming is received , or until maximal zoom is achieved .