This shot of the northern lights is taken on full frame, and with an ultra wide angle lens.
The corona you can see here was above our heads, and of course another line continues to the other side of the firmament, reaching it from one end to the other. Totally amazing !!
I had the camera on a bean bag on the ground, not on the tripod. The Lights were changing shapes and direction so quickly that I opted for the flexibility of the bean bag.
Exif: ISO 1600 ; f/2.8 ; 4 sec ; @14mm