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The same kind of crystals that form circumzenithal arcs can also produce sundogs. |
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Here a circumzenithal arc is visible near the top while a sundog is visible each side of the sun, which was conveniently hidden behind a tree. There was no sign of the 22 degree halo on this occasion. |
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The sun was 18 degrees up, close to the optimum altitude, when this image was taken. |
Just a couple of minutes later and the arc is fading as the type of crystals change. With the drifting cloud these colourful arcs were all too brief. |
Canon EOS 20D 21st June 2005
Wiltshire, England
