I found the below image (photographer credit: Xavier Leung, original photo), which depicts an American battleship currently docked in Hong Kong.
Is anyone familiar with this striking effect? I can't tell if it's post-processing, or if there is a physical means of achieving this effect.
Answer
The effect is done by defocusing the lens at the end of a long exposure. That way you get a sharp image overlaid with the bokeh you would get if the background was out of focus. Simply set your camera to manual focus, set the exposure time to say four seconds, then after three seconds quickly turn the focus ring as far as it will go.
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