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Victoria harbour bokeh | by Paul Cowell
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Victoria harbour bokeh

In photography, bokeh (Originally /ˈboʊkɛ/ /ˈboʊkeɪ/ boh-kay, and also sometimes heard as /ˈboʊkə/ boh-kə,Japanese: [boke]) is the blur,or the aesthetic quality of the blur,in out-of-focus areas of an image. Sometimes bokeh is misleadingly defined as "the way the lens renders out-of-focus points of light."since it is the characteristic of the image, not the lens itself. However, 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.[3] However, bokeh is not limited to highlights; blur occurs in all out-of-focus regions of the image.

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Taken on January 1, 2000