A Ring around the Moon

An incoming layer of high cirrus clouds announces a change in the high-pressure weather pattern. The ice crystals in the clouds create a highly visible 22° ring of light, also known as a halo around the first-quarter moon.

Lens: Tokina AT-X 12-24 f/f
Camera: Nikon D200
Exposure: f/4 15s ISO 200
Date: 12th February 2011

 

A Moon Halo

A 22° Halo like this is visible when thin cirrus clouds made of ice cover the sky and the ice-crystals in the clouds are oriented properly.
To the lower left of the Halo you can see the constellation Orion.

Camera Nikon D200
Lens Tokina 12-24 /4 at 12mm
Exposure 15sec. at f/4 ISO 360
Date: 21 February 2010