How Dark Is Dark?
Natural Bridges National Monument is set in the middle of a large “dark skies” area, noted (and notable) for the low level of light pollution. I was here in early 2010, but did not have what is needed to photograph the night skies.
Well, I now have better tools. My camera can be pushed to an ISO setting of 7200. My new lens is a fast f2.8. Combine those with a 13 second exposure, and the sky is revealed.
That faint red glow at the bottom is from Page, AZ, 95 miles away. Yeah – that is a dark sky.