A couple of nights back I managed to get some 10-minute subs on the Rosette using the Hyperstar 4 and the ASI 2600MC Pro CMOS camera with UV/IR cut filter. I added this new data to a lot of previously taken data – AND – no perceptable difference. So I am well into the diminishing returns region on this one with a total of about 16-hours of exposure time under Bortle 4.5 skies. So this one is well and truly done – and I really shouldn’t go back to it again unless at smaller focal length.
