This is a picture from Kitt Peak last month showing the haze layer over Tucson and lots of city lights. An airplane is inbound to Tucson International Airport. The small redish cluster of lights above the blinking trail of the airplane are radio and TV towers on Mt. Bigelow close to the home of the Catalina Sky Survey in the Santa Catalina mountains north of town. You can see the Catalinas dimly lit by city lights. This image was obtained with my 70-300mm zoom at 300mm focal length on my 20D. The exposure was 30 seconds at f/5.6, ISO 1600.
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