This photograph shows a petroglyph atop Signal Hill west of Tucson in Saguaro National Park and the Tucson Mountains in the background. I took this image while hiking with my Dad on Tuesday December 6 with my 70-300mm zoom set to 70mm focal length on my 20D. The exposure was 1/250 seconds at f/16, ISO 400.
1 comment:
Interesting one !! Does this sign mean something ??
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