An ice crystal halo around the waxing quarter Moon, Dec. 1, 2014, taken from New Mexico. This is a 30-second exposure at f/2.8 with the 14mm lens and Canon 6D at ISO 400, with the bright area around the Moon itself masked and made from 3 shorter exposures to lower the intensity of the centre of the halo. The altitude of the Moon was 62° and the halo shows a split appearance on the east and west sides from what is called a circumscribed halo adding to the normal 22° halo.
The Amazing Sky 