Lunar Halo
Taken by Alan Dyer on December 1, 2014 @
Silver City, New Mexico
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Camera Used: Canon Canon EOS 6D
Exposure Time: 16/10
Aperture: Unavailable
ISO: 400
Date Taken: 2014:12:01 20:35:05
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Details:
This was an ice crystal halo around the waxing quarter Moon on December 1 with hazy skies moving in but clear enough to still reveal the stars in the moonlit sky. The unique aspect of this lunar halo is that it is double. On the east and west sides you can see the halo split in two. This is an effect of two haloes superimposed: the normal 22° halo and the so-called circumscribed halo. The Moon's attitude was 62° and the appearance of the two haloes matches the computer simulations of how they should appear at that altitude. See Les Cowley's Atmospheric Optics page at http://www.atoptics.co.uk/halo/circum.htm
This is a 30-second exposure at f/2.8 with the 14mm lens and the Canon 6D at ISO 400. I shot this from New Mexico. It's the best lunar halo shot I've managed to capture and it wasn't even around a Full Moon!
Photographer's website:
http://www.amazingsky.net
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