Late Afternoon 22 degree Halo

Most haloes aren't very strong and come and go as the cloud changes. This is a typical example of one that would have been missed if I wasn't looking out for them.

The first sign of a halo was this very weak vertically extended sundog.

As the veil of thin cirrus moved through it developed into a more complete 22 degree halo.

Canon EOS 5D   2nd April 2011
Wiltshire, England

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