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Lightning from a summer thunderstorm pierces through cloud layers of the cumulonimbus cloud above the Tucson Mountains on the western edge of Tucson, AZ in the Arizona Sonoran Desert.  Original photographed on a Wista 4x5 field camera with a 150 mm Schneider Symmar f/5.6 lens on Ektachrome 64 4x5 sheet film exposed a f/8 for approximately 5 min.  Original digitized on 13 September, 2013.