Day 20: Bokeh
It was another gloomy rainy day here in this vast, flat, midwest nebula. I decided to wait until it was dark to do something with the street lights since there was no visible sun all day.
A lot of people think that bokeh is just a fancy word for shallow depth of field. While this is usually a key component in bringing about the effect, it actually refers to the out of focus light points in a photo.
Definition of bokeh according to Wikipedia (http://en.wikipedia.org/wiki/Bokeh):
In photography, bokeh is the blur, or the aesthetic quality of the blur, in out-of-focus areas of an image, or “the way the lens renders out-of-focus points of light.” 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.