M51 The Whirlpool Galaxy

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Date: 12 May 2015
Location: High Halden, Kent
Exposure: 80 x 90sec at ISO 2000
Telescope: Celestron C11 with TS 0.8x reducer/flattener on Skywatcher EQ6 mount
Camera: H-alpha modified Sony A7S
Guiding: Nikkor 300mm lens with QHY5 camera.
Filters: IR/UV cut filter
Processing: Stacked in PixInsight and stretched with Arcsinh Stretch
Comments: First light with the newly modified Sony A7S. SQM reading 20.8-21.0