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Subject:M13
Author: Marc Leduc
Scope: William Optics Megrez 90mm
Instruments:CGEM, Canon 20D, TRF-2008 TeleVue Flattener
Exposure time:3 X 4 minutes + 4 X 5 minutes, ISO 400
Place & Seeing:Lac-Beauport, Quebec, Canada
Date:September 2010
Remarks: Astronomik CLS-CCD filter.
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