Thank you gentlemen.
Hot tips? Hmmm....get the chocolate cake with mint ice cream. Much better than the flan. π
Oh, sorry. I don't know if they are hot tips. I set the focal length of the camera to 75mm, the aperture to 2.8 and because I think the aperture should be polygonal, I set it that way with 8 blades. Don't really know if that makes much difference in this case. Probably not.
Just play with it and be patient. Reduced DOF seems to increase render times substantially.
Good luck.
Dave