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Circumscribed halo birth
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On this late May, it is about 3:00 PM local time. The Sun has just pass the meridian and is at 63 degrees of elevation. The low presure aera which is coming is preceded by a cirrus veil. In a sky partially filled with cumulus, a 22 degrees halo is easily visible. However, its outlines are fuzzy and its colors weak.
In fact, it seems that it is the result of a mix between a circumscribed halo and a 22 degrees halo. At the Sun elevation (see this sketch), those two halos are roughly superimpose, whence a fuzzy effect. We will see in the following picture how the circumscribed halo split up from the 22 degrees halo as the Sun rise in the sky.
Seen 12211 times See the next picture of that series.
Instrument   27 mm focal length
Exposure & film   1/1000 s with digital camera Camedia 5060
Date & place   May 30, 2004, Lesconil (Finistère)

 The others pictures of "Circumscribed halo"
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