This was the first image of an aurora I had taken. Big excitement when this image appeared, despite the very poor conditions.
I had to wait for approx 2 hrs for the cloud & snow flurries to abate before I could get any image of the aurora.
By this time, the lens had snow all around the perimeter of the front of the lens but strangely enough, not in the centre. I guess this is why the image is soft on the edges. The cloud associated with the snow flurries had also attenuated the light from the aurora by almost 3 stops. Extremely difficult to see, but the camera captures more light than the eyes do.

As the Aurora activity was low, I estimated 2 minutes would be required. The time exposure was long enough for the stars to leave a star trail, even with a 16mm wide angle lens.

The image was actually 102s - guess I counted quicker than normal. Yep, my Canon intervalometer did not arrive until I returned back to Sydney. Online shopping does have it's disadvantages sometimes.

The yellow light is Björkliden, a small village about 3 km away from this location.
Lake Tornetrask, a frozen lake, is to the right.