Im just trying to find how to use DOF in poser 2014 I think I need to know how far from the camera the part i want in sharp focus is away from the camera. I can find mention on the net about a script for poser 7 to measure the distance of any high lighted object so you can enter that value for the camera , is there such a script for poser 2014 , or even some other way

Set your focus distance and then adjust your f-stop as desired. Imo a better solution is to render out a zdepth and use Photoshops Filter/Blur/LensBlur...you have much more control and adjusting to effect is a breeze.

yes I understand i need to set the focus distance but how do I find out how far away the object is for example a figures face is ,so thats all thats in focus?

When you adjust the camera's focus_Distance dial, a crosshair should appear on screen. Adjust the crosshair so that it is where you want the focus point to be and that should be it.

perhaps this is help:

http://3d-fantasy-art.deviantart.com/art/Easy-Depth-of-Field-in-Poser-318974378

Just be mindful that you may need to push your pixel sampling to approximately 10.  Otherwise, the out of focus area will appear grainy.  This link should also help:

http://www.3dfantasyart.co.uk/Tutorials/DOF%20in%20Poser%20Pro.pdf

Goto the display menu, then down to guides, then Focus Distance Guide.  This will bring up the focusing ring that moves for DOF when you use the focus distance dial.