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Photo of the Week – “Northern Lights Spiral” — *Northern Lights Spiral” — Photo of the week ending February 7, 2015*

The northern lights in a spiral, from the display on February 1st, 2015. You can read about and see more photos from that night there if you like.

Technical notes

I bumped the aperture up a bit from the lowest f/2.8 to avoid vignetting at the corners. Vignetting tends to get bad on this lens when I have it fully open and at the shortest focal length. Still used only a half-second exposure because, man, the lights were bright that night!

Nikon D7000 Sigma 17-50mm f/2.8 EX DC Lens for Nikon Focal Length: 17 mm ISO: 2500 Aperture: f/3.5 Shutter Speed: 1/2 sec