We all hate unwanted camera image blur from camera shake or the type of unintentional motion blur that subdues the clarity of the main focal point of interest when snapping a moving subject, but there are times when the blur can be a very desirable artistic effect when intentionally playing with a shallower focal depth on a lens. It can help to more subtly draw attention to a focal point using the blur as a means of subtly cropping an image whilst at the same retaining the rest of the image to place context on macro close up shots for still subjects.

  Its also a particularly visually pleasing lens effect at various intensities in portrait snaps too if done properly. This wanted or intentional blur created through shallow focal depth of field is known as Bokeh.  Depending on the type of lens the resulting unique effect is determined by the optic glass characteristics within the physical dimensions of the lens, and number of blades that the lens aperture iris has. You can find an example of Bokeh being used in these macro close ups snaps, but its generally much more visually impressive in portrait snaps, even the captured background bokeh within a portrait context without a focused subject can be a pretty pleasing visual subject in itself, almost like a painting. The example images used on this particular immediate page to demonstrate what bokeh is are from scaled down desktop wallpapers I found on the internet. For many more examples of intentionally used bokeh from around the internet just click here.