Mike Crowle
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29 April 2008
Globular cluster M12 in Ophiuchus
Canon EOS 40D
,Celestron C8 telescope
Guided off-axis for 2 x 6.5 minute exposures at f6.3, ISO 1000. The 2 images were 'stacked' and dark frames subtracted using DeepSkyStacker software.
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© 2016 Mike Crowle
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