Messier 101 shot under the recently challenging skies of Southern California (Chatsworth, north of Los Angeles - Bortle 6 to 7). 140 subframes shot with the ZWO ASI533MC @ Gain of 150 at 120 seconds per frame; using the Antlia Triband RGB Filter and directly mixed frames with the IDAS NB1 (Ha, Hb and OIII) processed in Pixinsight, GraXpert, Topaz DeNoise and Photoshop. Shot with a heavily modified SkyWatcher Quattro 8" with the Starizona .75 Reducer/Coma Corrector.