A full day in the wilderness. I opened the shutter when the sun was behind the huge saguaro cactus, and closed it the next day when the sun was in the same spot. You can see the arc of the sun doesn't quite match up from day to day - it changes position in the sky by a barely noticeable amount each day.
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Series Keywords: ultra long film based exposures of the sun crossing the sky, sun arcs, experimental film chemistry
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