Hi David, what does the "distance" of camera mean ? is it from the distance from focal point ? Thanks for your help. Regards, Atul -- View this message in context: http://vtk.1045678.n5.nabble.com/vtkCamera-focal-length-to-pixels-tp5728809p5728829.html Sent from the VTK - Users mailing list archive at Nabble.com.