A lunar halo and aircraft contrail, as seen and shot through the plexiglas viewing dome on the roof of the Churchill Northern Studies Centre, Churchill Manitoba, early in the evening of Feb 9, 2014. The lens is the 8mm Sigma aimed straight up in the Dome to take in the entire sky from horizon to horizon. The Dome provides very little distortion. The contrail is projecting its shadow onto the lower clouds, producing the dark borders outside the contrail.
The Amazing Sky 