Bokeh or defocus in Blender's default render engine? Is there a way to do Bokeh or defocus or anything of the sort in Blender's default render engine?
If you select your camera, and go to the camera tab on the properties bar, there should be a Depth of Field tab.


You can change the object that will be the focus point, or you can input a distance instead. Change the value of F-Stops to achieve the Depth of Field/Blur effect you're going for.
As for Bokeh, tick the High-Quality box and you can change the number of blades to whatever bokeh effect you're trying to achieve.