I wasn´t happy about the deep blur in eyeon fusion, it is easy to use, but it creates some artefacts and it has no blooming. So i tested the AE plugin frischluft lenscare and nothing happend.
The Plugin doesn´t understand float values (1) and can´t read the Maya IFF Z-Channel (2)
I used a CustomTool (3a) to copy the Z-Channel to the readable red Channel (3b)
In the next step i used ColorCurves (4a) to get some values between 0 and 1. Just find the lowest color and make it black (4b).
same game for the highest value and the whitepoint (5)
EDIT: After some testing i thinks its better to use 0
after telling DepthOfField to use the red channel (6) i could select (7a) and define the focalpoint with this simple Expression (7b). Now i can use the tool and play around with the radius (8) and all the other stuff.
i will try to make a macro for this and post it here sometime in the future.