Postprocessing Stack PC vs Mobile different results

Hello,
I am using a post processing effect DOF, to focus the camera on the player instance...
the effect range is perfect on computer, but, is out of range in the camera.

Code:
DepthOfFieldModel.Settings DOFM;
. ...
...
mainPlayerTransform = GameObject.Find("Player").transform;
float distance = Vector3.Distance(mainPlayerTransform.position, myCam.position);
DOFM.focusDistance = distance;
PBehaviour.depthOfField.settings = DOFM;