Kamis, 22 April 2010

22 Degree Sun Halo on Rabbit Ears Pass


I caught this sun halo on Rabbit Ears Pass near Steamboat springs a few weeks ago. Halos are caused by diffracted light passing through cirrostratus clouds. These clouds are really thin sheets of ice crystals. Existing at 20,000 ft, these thin clouds usually presage precipitation. In this case it represented the end of it. Rabbit Ears Pass had 3 feet of fresh snow that we were exhausted trudging through.


The halo was so large, that I had trouble capturing the whole thing with my standard 35mm lens. I had a neutral density filter with me, so I experimented with that and with changing the colors on my computer to try and enhance the visual effect.



For more pictures of the sky, visit Skywatch Friday.

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