diff --git a/src/osgGA/TrackballManipulator.cpp b/src/osgGA/TrackballManipulator.cpp
index f936a8ed1..03a444617 100644
--- a/src/osgGA/TrackballManipulator.cpp
+++ b/src/osgGA/TrackballManipulator.cpp
@@ -272,7 +272,7 @@ bool TrackballManipulator::calcMovement()
 
         // pan model.
 
-        float scale = -0.5f*_distance;
+        float scale = -0.3f*_distance;
 
         osg::Matrix rotation_matrix;
         rotation_matrix.set(_rotation);