What did I learned photographing California Nebula. Main lesson is photographing DSO shoot for a objects higher in the sky. Here is 8 hours of NGC1499, from Bortle 7-8 zone, shot with Canon T3i, 135mm F/2.8, ISO 1600 with L-Enhance filter. #astropic Additionally RaspberryPI are very good tester of powerbanks :D as heart of my rig is RPI with KStars/EKOS/INDI