First time I stayed on a target for more than a few hours with one of my new AG iDK-10 using the great SBIG STT-8300. This is about 18 hours of total time in LRGB at our backyard observatory we built in Fall of 2017 in bortle 5 skies. 19 x 900" R 18 x 900" G 19 x 900" B 23 x 600" L