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Bokeh balls is the aesthetic quality of blur produced in the out-of-focus points of light of an image produced by a lens. Bokeh balls are particularly common when one is doing back-lit photography. Bokeh balls are fun and I only discover them after having taken the picture and when I am in post-processing, making their presence in photographs unpredictable and serendipitous. In this picture of ice covered leaves of grass shot in back-lit conditions I ended up with multicolored bokeh balls (to the left of the grass).
May the curiosity be with you. This is from “The Birds are Calling” blog (www.thebirdsarecalling.com). Copyright Mario Pineda.