Reprocessed, levels and curves for each channel separately, then histograms together.
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M13 Star Cluster in Hercules. LRGB : 48:24:16:24 minutes, using 8 minute subframes.
Apogee Alta U8300 ccd camera cooled to -30C, through APM115-805. APM FF32 field flattener,
Astrodon Gen II LRGB, Astrodon Monster Moag and DSI Pro II for guiding.
Mounted on 14" LX200GPS fork.