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M51 Whirlpool galaxy. C9.25 telescope on unguided CG-5 with 0.63x focal reducer. SBIG ST-402ME camera. RGB : 12x30", Luminance : 23x35" Bahtinov mask for focusing. Stacked with DSS and processed with PS. 20th of June 2015 in Vall d'Ebo, Alicante Spain. Juan Pablo Revert.
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