Photo of the Week for October 17, 2014
David Crombie captured this beautiful image earlier this year while on a trip to Waterton Lakes National Park in Alberta. Faint green air glow produced the wispy glow over the mountain and apparently reaching toward the Milky Way. Airglow is related to the aurora appears in time exposure photos of the night sky as ghostly ripples of aurora-like light typically below 15 degrees above the horizon. Its real altitude is about 100 kilometres.
David’s photo is a single exposure with the foreground lit by a nearby campground and distant streetlights. He used a Nikon D800 DSLR camera with a 14-24mm lens set to 14mm and f/2.8 for this 30-second exposure at ISO 4000.