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2010.06.06 Tangent Arc Iris

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Upper tangent arc- part of a circumscribed halo.

 
6 June was definitely this year's halo day. First we have had some really pretty altocumulus virga: [link]
Not much later high cirrus moving rapidly casted some REALLY strong tangent arc. Well, as always I was too excited to get camera immediately :)
And it was only the beginning... I remembered from Greenler's book that strong tangent arc may indicate crystals that create also strong parhelia and... parhelic circle. I knew where to look, so I worn my polarizing sunglasses and stared...


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Postprocessing: merged from two pictures, slight chroma.
Image details
Image size
1700x1300px 357.42 KB
Make
SONY
Model
DSC-H3
Shutter Speed
10/20000 second
Aperture
F/8.0
Focal Length
6 mm
ISO Speed
100
Date Taken
Jun 6, 2010, 4:26:42 PM
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