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Also taken on April 30, 2011 in Sokum Ridge Park using the f3.5/200mm Minolta Rokkor lens (on Canon 300D) piggy back on a 4.25" reflector, mounted on a motorized drive. Stack of 15 images (30s exposure time, ISO-1600). Stacked in DeepSkyStacker, processed in Nebulosity. M13 is a truely nice globular cluster, which is 25,000 light years away from earth.
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