Would you know how to do this?

[Jeff]

the lens blur can be tricky to get right because it has several parameters.

here's a picture that you can use to practice. the one on the top left is in focus, so separate that into a layer of its own first, and then try to mimic those other blurs by varying the parameters for lens blur. doing this should help you get a better feel for what each of the parameters do so you can adjust accordingly on your own pics.

you could also follow up the lens blur some other filters, like unsharp mask or high pass on soft light if the bokeh itself needs to be sharpened. you could also play with the colors via adjustment layers -- particularly the saturation. blurring of any kind tends to take away some of the richness of color the original had, so you could try to restore that by increasing saturation or vibrance.

i haven't seen the after effects filter but it sounds like it would work better than the lens blur, if you have access.