Bokeh is the out of focus “oof” area on a picture. smooth creamy oof areas are generally felt to be more pleasing to the eyes.
here is a mosquito on a landscaping log taken with a 105mm f2.8 nikkor
and here is a short tree in winter with the 80-200mm f2.8 nikkor
and here is an entirely oof picture of people, a christmas tree and some blinds with the 50mm f1.4 AF nikkor showing the “circles of confusion.”
