I don't know if this is your problem, Ricky, but to render DOF without it being grainy you have to set the rays per pixel on at least 64. Any lower, and it will look grainy. The same is true for soft shadows.

This is not my "second childhood". I'm not finished with the first one yet.

Time flies like an arrow; fruit flies like a banana.

"I'd like to die peacefully in my sleep like my grandfather....not screaming in terror like the passengers on his bus." - Jack Handy