Using Live View exposure simulation had no effect on low surface brightness objects. I tried viewing a mag 4 glob in this mode with ISO set to 3200. I used both the camera LCD (set to lowest brightness) and a laptop. Neither method allowed me to view the DSO in Live View using an 8" SCT @ f/6.3.
With respect to my scope, my previous conclusion still stands: Focusing Low surface brightness DSO's using Live View will be problematic.
Perhaps a larger aperture scope combined with a faster f ratio would provide better results.
I'm disappointed.
Mark