Been playing with Depth of field lately.
Rendered this out using separate layers for each item, with each layer having several passes. Used MultiLayer to keep all the layers and passes for each frame of each scene contained within one file.
Brought the sequence into Nuke and composited. To my amazement, the focus plane in the zBlur node matched up exactly with the camera focal position in Blender. Brilliant.
Rendered the composited image sequence out of Nuke and created the QuickTime using After Effects.
Loving how easy it's becoming to use Blender in my workflow like this. Just need to figure out a way of getting the Blender Vector pass working in Nuke and I'll be one happy bunny :)