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Image of M31 taken on 27th Dec 2016, a beautiful clear night and very dark once the street lights were switched off.

10x30 second subs an 5 darks at ISO6400 with a hired Sony A7S II on my Explore Scientific ED80 APO Triplet with guided HEQ5 Pro.

I split out the channels from the RAW files and then stacked and processed them individually with PixInsight with further tweaking of the combined image. [Neill Mitchell]