June 7/8 Aurora from Alberta
Taken by Alan Dyer on June 7, 2015 @
near Gleichen, Alberta
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Camera Used: NIKON CORPORATION NIKON D750
Exposure Time: 8/1
Aperture: f/2.8
ISO: 1600
Date Taken: 2015:06:08 15:18:11
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Details:
Last night, Sunday, June 7, I headed out to a nearby abandoned farmyard to shoot the planets setting into the western twilight. But as the sky darkened the faint arc of an aurora appeared to the northeast, promising a fine show after midnight.
Sure enough, as the sky got dark, which doesn’t happen until very late now at 50° north in mid-June, the aurora began to dance.
The first image is a frame from the display at its best. It is one of 400 frames I shot for a time-lapse sequence.
The second image is from the start of the sequence, just as the aurora was beginning to get good, with curtains of green laced with tints of magenta and purple. At this time of year the tops of the curtains often look blue, as they scatter direct sunlight streaming over the pole.
However, the colours were not visible to the unaided eye — only the camera brought out the colours, as this display never got intensely bright to the eye.
The third image is from the end of the sequence as the display began to spread out, becoming patchy and less colourful, a typical behaviour after a substorm outburst.
Each exposure is 8 seconds at f/2.8 with a 24mm lens and Nikon D750 at ISO 1600.
Photographer's website:
http://www.amazingsky.net
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