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Birch Pollen Corona on April 2nd, 2011

The spring of the year 2011 brought unusual amounts of pollen, but only twice pollen coronae could be observed at Trier. Maybe the various pollen  species of different sizes spread at the same time only produced the typical brownish aureoles often observed when the sky is not quite clear. On April 2nd, the birches were in full blossom. Only the slightly elliptical shape reveals the coronae as pollen coronae. This shape, without distinct lobes, is typical for birch pollen coronae. Leica M8.2, Summarit 90 mm f/2.5 and Nikon D90, Nikkor 18-200 f/3.5-5.6 ED (below). Processed with Adobe Photoshop CS5.


Birch pollen corona. Leica M8.2, Summarit 90 mm f/2.5 and Nikon D90, Nikkor 18-200 f/3.5-5.6 ED (below). Processed with Adobe Photoshop CS5.


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