Bokeh (derived from Japanese, a noun boke 暈け, meaning "blurred or fuzzy") is a photographic term referring to the appearance of point of light sources in an out-of-focus area of an image produced by a camera lens using a shallow depth of field. Different lens bokeh produces different aesthetic qualities in out-of-focus backgrounds, which are often used to reduce distractions and emphasize the primary subject.
Bokeh is important for medium telephoto "portrait lenses" (typically 85–150 mm on 35-mm format) because the photographer would typically select a shallow depth of field (wide aperture) to achieve an out-of-focus background and make the subject stand out.
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