Tuesday, 30 July 2013

ar11805 Wilson effect 30th July

ar11805 ha by Mark Townley
ar11805 ha, a photo by Mark Townley on Flickr.

AR11805 shows the foreshortening depression of the famous Wilson Effect as it nears the limb. Taken with the 100mm PST mod at 3200mm fl with the DMK31 camera.

Posted by BrierleyHillSolar at Tuesday, July 30, 2013