A couple of full disks from today; first up with the Coronado SM90 at prime focus, then followed by the double stack disk with the Lunt LS50 etalon and Daystar Quark. Camera used in both instances was the FLIR GH3 ICX916M. There isn't a huge amount of difference in details that would normally be expected in a single stack double stack comparison. Maybe I didn't have the etalons tuned quite right?