The Northern Lights over southern Iowa were the brightest I have ever seen. A long row of cars showed up at the lake as people came to watch. The lights filled so much of the sky that I used a 15mm lens that has a 180 degree diagonal angle of view to take most of it in.
Exposure data for both images: Canon 5D Mark III. Canon 15mm semi-fisheye lens. f5, 8 seconds, ISO 3200.

