Fig. 21: Circumpolar stars above a high current pylon on Glaubenberg nearby Sarnen in canton Obwalden. The bright light pollution on the horizon is caused by the area Zurich-Aarau-Lucerne. I used a flash to illuminate the foreground. Next time I should use a warm color filter to match the color temperature of the night sky. Or use a second exposure to process differently. It's way too blue. Nikon D200; Δt=1800 s; f=13 mm; f/4.0; ISO 100; 9 February 2008 22:02:20
