Technical details: Location / Date: Outside of Kopparberg, Västmanland, Sweden / 2017-March Optics: Orion Optics UK AG12 Mount: 10 Micron GM1000 HPS (Unguided) Camera: Canon EOS 100D (Modded with Baader ACF filter) Exposure: Exposure: 46x 180 seconds, shot on ISO 3200 + 16 x 45 seconds shot on ISO1600 (cumulative exposure time is 2 hours, 30 minutes and 30 seconds) Processing: Pixinsight and Photoshop   Image details: The Leo Triplet (also known as the M66 Group) is a small group of galaxies about 35 million light-years away in the constellation Leo. This galaxy group consists of the spiral galaxies M65, M66, and NGC 3628. (Information from Wikipedia)