My fascination with contrails appears to have no sign of letting up.
I love the beautiful white plumes seen in the middle of the day. I love the burnt orange trails in the last rays of sunlight after sunset.
These black contrails however had an almost ominous mystique. Better still I got experience it both ways.
Photo: Robert Rath, 'Both Ways', 1/50s f/7.1 ISO160 200mm