Ok, to answer my own question... It is the long exposure time. See http://www.solargraphy.com/index.php?option=com_content&task=view&id=13&Itemid=14 http://www.

Ok, to answer my own question... It is the long exposure time. See http://www.solargraphy.com/index.php?option=com_content&task=view&id=13&Itemid=14 http://www.solargraphy.com/index.php?option=com_content&...