I've been trying to crack the anamorphic lens effect with Daz cameras and I think I finally got close thanks to a forum post (https://www.daz3d.com/forums/discussion/603211/anamorphic-process-in-daz-3d-iray).. I set my lens distortion on poly3 at 0.1 and placed a plane in front of the camera with an oval cutout in the middle. This gives the shape of the bokeh. As a matter of fact, I only added some sparks to the background to see what the bokeh would look like.