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Old 26-01-2014, 02:59 PM
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cometcatcher (Kevin)
<--- Comet Hale-Bopp

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Join Date: Jan 2005
Location: Cloudy Mackay
Posts: 6,542
Yes Mardy has a good explanation. With deep sky photos, it's a good idea to leave just a little bit of brightness in the dark regions as there's often still some faint traces of nebula or other objects of interest.
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