M33 crop
Date 01/09/2017. Crop of M33, the Triangulum galaxy. Mansonville, southern France.
Weather: Clear skies and good seeing. The guide scope stayed on target the entire night. Moon was out for some of the exposures.
Optics and camera: Skywatcher Evostar 120 F/D=8.33 (Achromat) with a Baader UHCs filter. The camera was a IR-filter removed Canon 600D.
Settings: 25 x 3 minute lights, 50 darks from library, 50 flats taken recently and 50 bias frames. ISO 800.
Mount: Skywatcher AZ-EQ6 with extension pillar.
Processing: The Lights and calibrations frames were processed using Pixinsight. The final images were balanced to retain average white stars. I also used Gimp to add a selective Gaussian blur over a 4 pixel range to blend residual RGB noise.
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