ArcticPhoto
Second Officer
Norway
Offline
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To "freeze" the movement of the auroras you need as short shutter speed as possible, preferrably less than 8 seconds. That means wide open aperture and high ISO. If the auroras are moving fast and you use a too long shutter speed it will all become a blur.
I always use a wide angle lens, between 14 and 24mm. Where I live the auroras cover large parts of the sky during powerful outbursts. It is also a good idea to include the landscape, that gives depth and a stronger visual impact.
This photo of a very fast moving aurora (almost like an explosion) was taken with a 14mm lens, 5 sec. exposure, f/3.5, ISO 2200 with a Nikon full-frame camera.
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