Noctilucent Clouds from Cypress Hills Interprovincial Park, Alberta, July 15, 2013, visible at the start of the night but fading as the Sun set lower below the horizon. This is a single frame, the first, in a 123-frame time-lapse, taken with the 50mm lens at f/2 and Canon 5D MkII at ISO 800 for 15 seconds. Light from the setting waxing Moon illuminates the ground and sky.
Noctilucent clouds in the high atmosphere far above and behind foreground thunderstom clouds moving across the horizon. The red fringe at right is from NLCs catching the reddish light of the setting Sun from their position and altitude. This is a single 11-second exposure with the Canon 5D MkII at ISO 400 and 135mm lens at f/2.8. It is part of a time-lapse sequence.
Noctilucent clouds in the high atmosphere far above and behind foreground thunderstom clouds moving across the horizon. This is a single 7-second exposure with the Canon 5D MkII at ISO 400 and 135mm lens at f/2.8. It is part of a time-lapse sequence taken from southern Alberta, Canada.
