And here I was about to post a new thread with DoF questions. :D

Since DoF rendering is far faster in p7, I've decided to finally give it a real try. i was hoping someone could give me some tips to improve the blur quality.

As you can see in this image (warning, large file size. ~2MB), the blur is pretty good up until it reaches the back of the scene, whereupon it gets kinda chunky.

I used a DoF python script to get the focal distance to the character's head, and that comes into nice sharp focus, so it's pretty easy to do. Where I started getting confused was at the fstop setting, which the poser manual is typically vague about.  What are some guidelines as to what fstop value to use?

In the above image, I set samples to 10 and used an fstop of 10. Should i have set the samples higher (please say no, 3 hours is testing my patience :P) or lower, the fstop higher or lower?

I'm fairly new to the more advanced poser techniques, so any advice is welcome.