Bokeh (derived from Japanese, a noun bokeh, meaning "blur" or "haze") is a photographic term referring to the æsthetic quality of the out-of-focus areas of an image produced by a camera lens using a shallow depth of field.[1] Essentially, bokeh is an aesthetic and qualitative measure of light distortion in the out-of-focus areas of an image, and is primarily caused by lens aberrations and aperture shape.