Do I see a retrograde? (Same azimut, different moments). Where is
this picture made?
Thibaud
At 21:33 4-5-2014, Barry Wainwright wrote:
The BBC has a series of pictures taken by pinhole camera at
http://www.bbc.co.uk/news/in-pictures-27221895
Image 7 is described thus:
John Rigg: "This is a six-month exposure using a pinhole camera made
from an empty soup tin and photographic paper, not film. The
resulting image is then scanned and reversed. The trails mark the
path of the sun across the sky as the seasons change. Days with
broken cloud show as a dotted line."
--
Barry
---------------------------------------------------
https://lists.uni-koeln.de/mailman/listinfo/sundial
---------------------------------------------------
https://lists.uni-koeln.de/mailman/listinfo/sundial