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In photography, bokeh (Originally , — also sometimes pronounced as , ) is the aesthetic quality of the blur produced in the out-of-focus parts of an image produced by a lens.〔 〕〔 〕 Bokeh has been defined as "the way the lens renders out-of-focus points of light".〔 (【引用サイトリンク】 PhotoWords/Lens )〕 Differences in lens aberrations and aperture shape cause some lens designs to blur the image in a way that is pleasing to the eye, while others produce blurring that is unpleasant or distracting—"good" and "bad" bokeh, respectively.〔 〕 Bokeh occurs for parts of the scene that lie outside the depth of field. Photographers sometimes deliberately use a shallow focus technique to create images with prominent out-of-focus regions. Bokeh is often most visible around small background highlights, such as specular reflections and light sources, which is why it is often associated with such areas.〔 However, bokeh is not limited to highlights; blur occurs in all out-of-focus regions of the image. ==Origin== The term comes from the Japanese word ''boke'' ( or ), which means "blur" or "haze", or ''boke-aji'' (), the "blur quality". The Japanese term ''boke'' is also used in the sense of a mental haze or senility.〔 〕 The term bokashi () is related, meaning intentional blurring or gradation. The English spelling ''bokeh'' was popularized in 1997 in ''Photo Techniques'' magazine, when Mike Johnston, the editor at the time, commissioned three papers on the topic for the March/April 1997 issue; he altered the spelling to suggest the correct pronunciation to English speakers, saying "it is properly pronounced with bo as in bone and ke as in Kenneth, with equal stress on either syllable".〔 〕 The spellings ''bokeh'' and ''boke'' have both been in use since at least 1996, when Merklinger had suggested "or Bokeh if you prefer."〔 〕 The term ''bokeh'' has appeared in photography books as early as 1998.〔 It is sometimes pronounced (boke-uh).〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「bokeh」の詳細全文を読む スポンサード リンク
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