The following images were created in 3dsmax and rendered with VRay using raytraced depth of field. The final image was produced using DOF PRO v3.0 using a depth map created in 3dsmax. As you can see the result is quite similar.
Original render - 00:30:53
No depth of field applied
Depth Map created in 3dsmax - 00:00:49
Depth Map
Original render with raytraced DOF - 02:25:35
Raytraced depth of field
DOF PRO generated image - 00:01:05
DOF PRO depth of field