Day 12 - photo experimenting with "bokeh"

In photography, bokeh ( /ˈboʊkə/ boh-kə,^[1] Japanese: [boke]) is the blur,^[2][3] or the aesthetic quality of the blur,^[4][5][6] in out-of-focus areas of an image, or "the way the lens renders out-of-focus points of light."^[7] Differences in lens aberrations andaperture 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.^[2] Bokeh occurs for parts of the scene that lie outside thedepth 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.^[2]However, bokeh is not limited to highlights; blur occurs in all out-of-focus regions of the image.