A long exposure shot of a ship on the Rhine river near Oestrich-Winkel, Germany. It is visible that even relatively slow objects will become unrecognizable if a long exposure time is chosen
<a href="//commons.wikimedia.org/wiki/User:DXR" title="User:DXR">DXR</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>