A while ago I posted about how to set up and use Maya’s Luminance Depth render layer preset, I just wanted to follow up with a quick video tutorial about how we use that pass when compositing. The content is a couple of years old but is used identically as of CS5. Please note you will need the Frischluft LensCare plugin for After Effects if you want to do your Depth of Field adjustment in Post in AfterEffects as in this example.
If you have other examples of how you’ve used it please share!