The lValue range and meaning depends on the property being queried. The following table describes possible values. Property lValue range and meaning Pan Value that specifies the pan setting in degrees. Note that a particular device might implement only a subset of this range. Tilt Value that specifies the tilt setting in degrees.
Positive values point the imaging plane up, and negative values point the imaging plane down.
Note that a particular device might implement only a subset of this range. Roll Value that specifies the roll setting in degrees. Positive values cause a clockwise rotation of the camera along the image viewing axis, and negative values cause a counterclockwise rotation of the camera. Note that a particular device may only implement a subset of this range. Zoom Value that specifies the zoom setting in millimeter units.