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Flag Corona and Aureole on April 17th, 2010.

Fabrics can act as diffraction gratings and produce colourful coronae around light sources when lit from behind. The image below nicely shows the coloured rings around the sun hidden by a flag. The corona comes very close to a natural corona. Some gallery images below also show a faint aureole with a bluish centre and a reddish rim, due to aerosols like water droplets or pollen. It may also be a Bishop's ring due to Eyjafjallajokull volcanic eruption. Leica D-Lux 4, processed with Adobe Photoshop Elements. 


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