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Directory Root >> Events >> Atmospheric Optics >> Rainbows >> Primary and secondary bows

Arc en ciel 13 (567 x 425 - 17 Ko)

©Serge Vasseur [info]

Photo taken on Sunday 21 May 2006 in Presles "Les Coutumes" (Val d'Oise)
[Digital Photo Camera]
CANON Powershot S 50
Exposure : 1/640s à 5,3
[Without telescope]
seen 1087 times
Author 's note :
Heur locale: 20h02
La pluie s'éloigne...et l'arc aussi!
Quelques petits nuages cumuliformes se forment déjà derrière la pertubation.
On remarqura sur cliché de détail, l'importante distorsion des bandes colorées. L'humidité près du sol est certainement responsable de ce phénomène. La bande rouge-orangée domine au détriment du jaune vert. La largeur se rétablie progressivement avec l'altitude.
Traitement de l'image.

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